leg site hole core coretype section top interval unit number sub unit pieces observer rockname contact phenocrysts mineral name (1) phenocrysts percent (1) phenocrysts size (1) phenocrysts description (1) phenocrysts mineral name (2) phenocrysts percent (2) phenocrysts size (2) phenocrysts description (2) phenocrysts mineral name (3) phenocrysts percent (3) phenocrysts size (3) phenocrysts description (3) phenocrysts mineral name (4) phenocrysts percent (4) phenocrysts size (4) phenocrysts description (4) phenocrysts mineral name (5) phenocrysts percent (5) phenocrysts size (5) phenocrysts description (5) phenocrysts comments groundmass color vesicles percent vesicles size vesicles shape vesicles distribution vesicles miaroles vesicles comments structure alteration veins frractures size veins fractures orientation veins fractures percent veins fractures comments main comments more data latitude numerical form longitude numerical form depth top interval depth below sea floor 104 642 E 002 Wash Core 03 000 0003 1-6C. DU CONGLOMERATE, PARTLY OXIDIZED, SUBROUNDED TO ROUNDED PEBBLES. see comments see comments see comments see comments see comments see comments see comments see comments Pebbles are < 30 cm in size. Components: vesicular, fine-grianed basalt, aphyric, sparsely vesicular, phyric basalt; pale green coarse-grained basalt, fine-grained basalt with chilled margin and pockets filled by pale green tuff; carbonaceous tuff, light brown basaltic lapillistone; quartzofeldspar biotite gneiss; slate, biotite rich; fine-grained sediments. Unit S3. N 67.22000 2.93000 0213.00 21300 104 642 E 003 Rotary 01 000 0003 1-31. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 624E-2W-3. Unit S3. N 67.22000 2.93000 0322.50 32250 104 642 E 004 Rotary 01 000 0003 1-2. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-2W-3. Unit S3. N 67.22000 2.93000 0326.50 32650 104 642 E 004 Rotary 01 031 0004 All DU TUFF, LAPILLI TUFF, AND LAPILLISTONE. see comments see comments see comments see comments see comments see comments see comments see comments Color is dark red to dark red brown, with basaltic scoria, red brown tuff, brownish yellow pumice, feldspar, coarse-grained basalt. UnitS4. N 67.22000 2.93000 0326.50 32681 104 642 E 005 Rotary 01 000 0004 1-8E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-4R-1. Unit S4. N 67.22000 2.93000 0334.90 33489 104 642 E 005 Rotary 02 000 0004 1-5B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-4R-1. Unit S4. N 67.22000 2.93000 0335.95 33595 104 642 E 005 Rotary 02 046 0001 6-9. DU HIGHLY ALTERED, SPARSELY PLAGIOCLASE, PHYRIC GRAY GREEN BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Moderately vesiclar, but locally nonvesicular, coated with yellow limonite and filled with red clay. Hairline cracks throughout. Unit F1. N 67.22000 2.93000 0335.95 33641 104 642 E 005 Rotary 03 000 0001 1-9. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-5R-2. Unit F1. N 67.22000 2.93000 0337.45 33745 104 642 E 005 Rotary 03 129 0005 All DU FINE-GRAINED BASALTIC VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Dark red brown to yellowish red brown fine-grained basaltic vitric tuff, median clast size <0.1 mm, containing angular to round fragments. Few subunits with gradational contacts, and horizontal bedding. Unit S5. N 67.22000 2.93000 0337.45 33874 104 642 E 006 Rotary 01 000 0005 All DU UNIDENTIFIED DRILLING RUBBLE see comments see comments see comments see comments see comments see comments see comments see comments Unit S5. N 67.22000 2.93000 0344.60 34460 104 642 E 007 Rotary 01 005 0002 All DU FINE-GRAINED, APHYRIC, BLACK TO DARK GRAY BASALTIC FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Highly vesicular and strongly altered groundmass, with vesicles unfilled but coated with white (zeolites?) and/or with pale green smectite (celadonite?). Unit F2. N 67.22000 2.93000 0354.30 35434 104 642 E 007 Rotary 02 000 0002 1-23. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-7R-1. Unit F2. N 67.22000 2.93000 0355.80 35579 104 642 E 007 Rotary 02 111 0006 19. DU UNIFORMLY DARK RED BROWN, FINE-GRAINED TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Top and bottom contacts not recovered. Unit S6. N 67.22000 2.93000 0355.80 35690 104 642 E 007 Rotary 02 123 0003 21-23. DU FINE-GRAINED, APHYRIC, BLACK TO DARK GRAY BASALTIC FLOW. see comments see comments see comments see comments see comments see comments see comments see comments As Unit F2, except vesicles have only beige smectite(?) or limonite-coated rims, and alteration to base to pale gray green color. Unit F3. N 67.22000 2.93000 0355.80 35702 104 642 E 007 Rotary 03 000 0003 1-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-7R-2. Unit F3. N 67.22000 2.93000 0357.30 35729 104 642 E 008 Rotary 01 000 0003 1-2. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-7R-2.. Unit F3. N 67.22000 2.93000 0363.90 36389 104 642 E 008 Rotary CC 000 0003 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-7R-2. Unit F3. N 67.22000 2.93000 0364.05 36404 104 642 E 009 Rotary 01 000 0003 1A-2. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-7R-2, Unit F3. N 67.22000 2.93000 0365.90 36589 104 642 E 009 Rotary 01 022 0001 3-9B. DU FINE-GRAINED, SPARSELY PHYRIC, DARK GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Moderately to sparsely vesicular. Vesicles filled with calcite and dark green smectite rims, or open. Some light gray green smectite and fine dark green smectite alteration in groundmass. Native copper present in 9R-1, Piece 5b. 10R-1, Piece 1, contains smectite-rich zone that may be a chilled margin or zone of tectonic shear. Unit D1. N 67.22000 2.93000 0365.90 36611 104 642 E 009 Rotary 02 000 0001 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-9R-2, Unit D1. N 67.22000 2.93000 0367.40 36739 104 642 E 010 Rotary 01 000 0001 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-9R-1, Unit D1. N 67.22000 2.93000 0373.50 37350 104 642 E 010 Rotary 01 004 0002 2-18. DU FINE-GRAINED, APHYRIC, DARK GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Moderately vesicular, with vesicles filled by calcite, or rimmed by dark green or dark brown smectite. Iddingsite pseudomorphs after olivine locally glomeroporphyritic. 10R-1, Piece 2, contains smectite-rich zones that may be a chilled margin or zone of tectonic shear.Unit D2. N 67.22000 2.93000 0373.50 37354 104 642 E 010 Rotary 01 140 0007 19-21. DU HIGHLY ALTERED, CRYSTAL-BEARING TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Dark olive gray, possible tectonic, at contact to overlying unit; pale brown, highly fragmented away from contact. Unit S7. N 67.22000 2.93000 0373.50 37490 104 642 E 010 Rotary 02 000 0003 1-23. DU FINE-GRAINED, SPARSELY OLIVINE PHYRIC BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Very fine-grained smectite-rich zone at 8-10 cm , possibly an inclined chilled margin or tectonic shear zone. Sparsely vesicular, with green smectite and calcite fillings. Subparallel, dark streaking (flow fabric) throughout unit. Unit D3. N 67.22000 2.93000 0375.00 37500 104 642 E 010 Rotary 03 000 0004 1-12. DU FINE-GRAINED, APHYRIC TO SPARSELY PHYRIC GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Highly to sparsely vesicular with vesicles filled with calcite and dark green smectite. Some alternation to smectite(?) along fractures. Native copper blebs within vesicle fillings. Some weak development of streaky lamination. Unit F4. N 67.22000 2.93000 0376.45 37645 104 642 E 011 Rotary 01 000 0004 1-15E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-10R-3, Unit F4. N 67.22000 2.93000 0383.20 38320 104 642 E 011 Rotary 02 000 0004 1A-2H. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-10R-3, Unit F4. N 67.22000 2.93000 0384.65 38464 104 642 E 012 Rotary 01 000 0004 All DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-10R-3, Unit F4. N 67.22000 2.93000 0387.20 38720 104 642 E 012 Rotary 01 020 0005 All DU VERY FINE-GRAINED, APHYRIC BLACK BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Locally massive, but generally brecciated and highly altered to clay minerals. Unit F5. N 67.22000 2.93000 0387.20 38740 104 642 E 012 Rotary 01 068 0008 All DU DARK BROWN TUFF LAYER WITH POCKET FILLINGS OF VITRIC TUFFS IN THE UNDERLAYING BRECCIA. see comments see comments see comments see comments see comments see comments see comments see comments Contains cuneiform shards replaced by pale to dark green secondary minerals. Unit S8. N 67.22000 2.93000 0387.20 38788 104 642 E 012 Rotary 01 069 0006 All DU FINE-GRAINED, GLASSY, APHYRIC, BLACK BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Moderately vesicular, filled with dark green smectite with subordinate calcite. Unit F6. N 67.22000 2.93000 0387.20 38789 104 642 E 013 Rotary 01 000 0007 1-13E. DU FINE-GRAINED, APHYRIC TO SPARSELY PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Moderate vesicularity, vesicles filled with dark green smectite, some calcite, some coalescence of vesicles to irregular shapes. Euhedral plagioclase phenocrysts. Some local subhorizontal streaking (flow fabric) defined by smectite-rich bands.Unit F7. N 67.22000 2.93000 0394.80 39479 104 642 E 013 Rotary 02 000 0007 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-13R-1, Unit 7. N 67.22000 2.93000 0396.30 39629 104 642 E 014 Rotary 01 000 0007 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-13R-1, Unit 7. N 67.22000 2.93000 0399.80 39979 104 642 E 014 Rotary 01 080 0009 14A-16. DU DUSKY GREEN TO BROWN VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains fresh and altered vesicular and pumiceous shards. Unit S9. N 67.22000 2.93000 0399.80 40059 104 642 E 014 Rotary 01 107 0008 17-19. DU FINE- TO MEDIUM-GRAINED, APHYRIC TO SPARSELY PHYRIC, GRAY, BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments As Unit F7, except that the plagioclase phenocrysts become more common lower in the flow, along with an increase in grain size. Unit F8. N 67.22000 2.93000 0399.80 40086 104 642 E 014 Rotary 01 136 0009 20-21. DU MEDIUM-GRAINED, SPARSELY PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Sparsely vesicular with smectite coatings and some calcite fills. Plagioclase and olivine phenocrysts form 1%-2% and are <1.0 mm in diameter. Unit F9. N 67.22000 2.93000 0399.80 40115 104 642 E 015 Rotary 01 000 0009 1-15. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-14R-1, Unit 9. N 67.22000 2.93000 0405.30 40529 104 642 E 015 Rotary 02 093 0011 12A-13. DU MEDIUM-GRAINED, PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Nonvesicular and has light gray to white feldspar phenocrysts. Minor bleaching of groundmass, some fracturing filled with dark green smectite and calcite. Common dark green smectite patch alteration. Unit F11. N 67.22000 2.93000 0406.80 40772 104 642 E 015 Rotary 03 000 0011 1-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-15R-2, Unit 11. N 67.22000 2.93000 0408.20 40820 104 642 E 015 Rotary 04 000 0011 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-15R-2, Unit 11. N 67.22000 2.93000 0409.59 40958 104 642 E 015 Rotary 04 106 0012 8-10. DU MEDIUM-GRAINED, MODERATELY OLIVINE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments 0.5-0.75 mm diameter olivine phenocrysts, iddingsitized and smectite-rich. Highly vesicular at flow top breccia, with lower vesicles containing calcite and some green smectite. Smectite patch alteration throughout groundmass. Slightly more vesicular at flow base. Unit F12. N 67.22000 2.93000 0409.59 41064 104 642 E 015 Rotary 05 000 0012 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-15R-4, Unit 12. N 67.22000 2.93000 0410.99 41098 104 642 E 015 Rotary 05 045 0013 4-11. DU MEDIUM- TO FINE-GRAINED, MODERATELY PLAGIOCLASE + OLIVINE PHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Vesicular throughout, almost all vesicles open but some are filled with calcite and thin dark green smectite rimsUnit F13. N 67.22000 2.93000 0410.99 41143 104 642 E 015 Rotary 05 122 0015 10-11. DU MEDIUM-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Weakly reddened, highly vesicular near flow top, moderate to sparse below. Calcite, zeolite, green smectite fills in vesicles. Dark green smectite spotting or irregular patches throughout the groundmass. Unit F15. N 67.22000 2.93000 0410.99 41220 104 642 E 016 Rotary 01 000 0015 1-8B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-15R-5, Unit 15. N 67.22000 2.93000 0414.80 41479 104 642 E 016 Rotary 02 000 0015 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-15R-5, Unit 15. N 67.22000 2.93000 0416.20 41620 104 642 E 016 Rotary 02 123 0016 11-13. DU FINE-GRAINED, MODERATELY OLIVINE-PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Plagioclase phenocrysts are up to 4.0 mm long and olivines up to 0.7 mm in diameter. Highly to moderately vesicular with calcite, dark green smectite and zeolite fills. Unit F16. N 67.22000 2.93000 0416.20 41743 104 642 E 016 Rotary 03 000 0016 1-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-16R-2, Unit 16. N 67.22000 2.93000 0417.65 41764 104 642 E 016 Rotary 03 100 0017 9-14. DU FINE-GRAINED, APHYRIC, GRAY, BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recorved. Thick (>2.0 m) reddened gray to brownish gray highly vesicular flow top, containing reddish iddingsitized olivines, and green smectite or calcite filled vesicles. Vesicularity decreases to moderate or sparsely vesicular downsection., predominately dark green smectite fills. Development of subhorizontal laminar streaking (flow fabric) below 17R-2, 113 cm, seen as continuous and discontinuous smectite-rich laminae, some reddening from the iddingsitization of olivines. Some massive zones, e.g. 17R-4. Native copper disseminated throughout groundmass or within vesicles. Unit F17. N 67.22000 2.93000 0417.65 41864 104 642 E 017 Rotary 01 000 0017 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-16R-3, Unit 17. N 67.22000 2.93000 0424.30 42429 104 642 E 018 Rotary 01 000 0017 1-5F. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-16R-3, Unit 17. N 67.22000 2.93000 0432.70 43270 104 642 E 018 Rotary 02 000 0017 1A-3B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-16R-3, Unit 17. N 67.22000 2.93000 0434.12 43411 104 642 E 018 Rotary 03 000 0017 1A-2. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-16R-3, Unit 17. N 67.22000 2.93000 0435.28 43527 104 642 E 018 Rotary 04 000 0017 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-16R-3, Unit 17. N 67.22000 2.93000 0436.72 43672 104 642 E 018 Rotary 05 000 0018 1-13. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Light reddish brown, highly vesicular flow top, grading to brownish gray and gray. As Unit F17 with some subhorizontal fracturing < 1.0 mm wide filled with smectite. Generally weak streaking fabric in central flow. Disseminated copper present. Basal contact with S10 is irregular and quenched. Unit F18. N 67.22000 2.93000 0438.22 43822 104 642 E 019 Rotary 01 000 0018 1-8. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-18R-5, Unit F18. N 67.22000 2.93000 0442.10 44210 104 642 E 019 Rotary 02 000 0018 1-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See descrition in 642E-18R-5, Unit F18. N 67.22000 2.93000 0443.51 44351 104 642 E 019 Rotary 03 000 0018 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-18R-5, Unit F18. N 67.22000 2.93000 0444.73 44473 104 642 E 019 Rotary 04 000 0018 1A-9. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-18R-5, Unit F18. N 67.22000 2.93000 0446.13 44613 104 642 E 019 Rotary 04 137 0010 10 DU DARK BROWN TO GRAY GREEN, WELL-SORTED VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains accretionary lapilli and rounded clasts of brown to fine red tuff. Pale green smectite present in pore spaces. Very few fresh shards. Pocket infilling of scoriaceous material, top to F19. Unit S10. N 67.22000 2.93000 0446.13 44750 104 642 E 019 Rotary 05 000 0010 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-19R-4, Unit S10. N 67.22000 2.93000 0447.63 44763 104 642 E 019 Rotary 05 020 0019 4-6. DU FINE-GRAINED, APHYRIC, DARK GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recorved. Highly vesicular at flow top, dark greenish gray from smectite alteration. Local coalescence of vesicles to up to 25% of rock volume, filled with dark green smectite. Towards base, from 20R-4, 30 cm down to base of recovery, streaky (flow fabric) laminations present, accompanied by elongate green smectite-filled vesicles. [Unrelated rubble at 642E-20R-1(0-9 cm)]. Unit F19. N 67.22000 2.93000 0447.63 44783 104 642 E 020 Rotary 01 000 0019 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-19R-5, Unit F19. N 67.22000 2.93000 0451.60 45160 104 642 E 020 Rotary 02 000 0019 1-3D. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-19R-5, Unit F19. N 67.22000 2.93000 0453.01 45301 104 642 E 020 Rotary 03 000 0019 1A-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-19R-5, Unit F19. N 67.22000 2.93000 0454.34 45433 104 642 E 020 Rotary 04 000 0019 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-19R-5, Unit F19. N 67.22000 2.93000 0455.84 45583 104 642 E 020 Rotary 04 104 0020 8. DU MEDIUM-GRAINED MODERATELY PLAGIOCLASE-OLIVINE PHYRIC, GRAY TO DARK BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Highly vesicular, mostly dark green smectite filled with minor calcite and zeolite, grading to sparsely vesicular in lower section. Dark green gray smectite filled hairline fracturing. Some inclination of vesicles streaming in center of floUnit F20. N 67.22000 2.93000 0455.84 45687 104 642 E 021 Rotary 01 038 0020 A 12-14. DU AS UNIT 20. see comments see comments see comments see comments see comments see comments see comments see comments Unrelated rubble of volcaniclastic sediment at 642E-21R-1 (0-38cm). Unit F20A. N 67.22000 2.93000 0461.00 46138 104 642 E 021 Rotary 02 000 0020 A All DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 624E-21R-1, Unit F20A. N 67.22000 2.93000 0462.38 46238 104 642 E 021 Rotary 03 000 0020 A 1A-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 624E-21R-1, Unit F20A. N 67.22000 2.93000 0463.84 46383 104 642 E 021 Rotary 03 048 0021 7-12D. DU MEDIUM-GRAINED, MODERATELY PHYRIC, DARK GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Very dark gray to black highly vesicular flow top, red-veined and brecciated. Vesicles filled lower in flow by dark green smectite. 2.0-4.0 mm long plagioclase laths and <3.0 mm olivines present. Predominantly subvertical or steeply inclined smectite filled veining. Unit F21. N 67.22000 2.93000 0463.84 46431 104 642 E 021 Rotary 04 000 0021 1A-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-21R-3, Unit F21. N 67.22000 2.93000 0465.21 46520 104 642 E 021 Rotary 05 000 0021 1-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-21R-3, Unit F21. N 67.22000 2.93000 0466.63 46663 104 642 E 021 Rotary 05 061 0022 6. DU MEDIUM-GRAINED, SPARSELY TO MODERATELY OLIVINE-PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Euhedral olivines and plagioclase laths < 3.0 mm diameter. Moderately vesicular, filled with dark green smectite. Steeply inclined fracturing filled with smectite. Subhorizontal elliptical vesicles at 22R-2, 60 to 62 cm. Unit F22. N 67.22000 2.93000 0466.63 46724 104 642 E 022 Rotary 01 000 0022 1-10B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-21R-5, Unit F22. N 67.22000 2.93000 0470.50 47050 104 642 E 022 Rotary 02 000 0022 1-3C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-21R-5, Unit F22. N 67.22000 2.93000 0471.87 47186 104 642 E 022 Rotary 03 000 0022 1A-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-21R-5, Unit F22. N 67.22000 2.93000 0473.27 47326 104 642 E 022 Rotary 03 086 0023 4-7. DU MEDIUM-GRAINED, SPARSELY OLIVINE PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Highly vesicular flow top, smectite rimmed or unfilled at top, decreasing to moderate or nonvesicular in lower flow. Euhedral iddingsitized olivines and tabular plagioclase 0.3-0.5 mm diameter. Vesicular base. Unit F23. N 67.22000 2.93000 0473.27 47412 104 642 E 022 Rotary 04 000 0023 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-22R-3, Unit F23. N 67.22000 2.93000 0474.67 47467 104 642 E 022 Rotary 05 000 0023 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-22R-3, Unit F23. N 67.22000 2.93000 0476.17 47617 104 642 E 022 Rotary 06 000 0023 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-22R-3, Unit F23. N 67.22000 2.93000 0477.54 47754 104 642 E 022 Rotary 06 020 0011 All DU DARK RED BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Basaltic vitiric. Unit S11. N 67.22000 2.93000 0477.54 47774 104 642 E 022 Rotary 06 021 0024 2-12. DU MEDIUM-GRAINED OLIVINE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened brown gray highly vesicular flow top, iddingsitized olivines common. Vesicles filled with green smectite and some calcite. Some patch smectite alternation, steeply inclined 2.0 mm wide fracturing and brecciation at 23R-1, 17-34 cm. Unit F24. N 67.22000 2.93000 0477.54 47775 104 642 E 023 Rotary 01 000 0024 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-22R-6, Unit F24. N 67.22000 2.93000 0479.90 47989 104 642 E 023 Rotary 01 073 0012 4-6B. DU GREEN TO RED BROWN OR OLIVE BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Median grain diameter of 0.15 mm, with some fragments of finer grained differentiated tuffs and some medium sorted basaltic tuffs. Irregular bedding features. Unit S12. N 67.22000 2.93000 0479.90 48062 104 642 E 023 Rotary 02 000 0012 1-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-23R-1, Unit S12. N 67.22000 2.93000 0481.37 48136 104 642 E 023 Rotary 02 000 0025 1-12. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-23R-2, Unit F25. N 67.22000 2.93000 0481.37 48136 104 642 E 023 Rotary 02 125 0025 All DU FINE-GRAINED, APHYRIC TO MODERATELY OLIVINE-PLAGIOCLASE PHYRIC BASALT FLOW see comments see comments see comments see comments see comments see comments see comments see comments Moderate vesicularity, but variable and locally highly vesicular, some breccia zones. Vesicles filled with dark green smectite, locally calcite. Unit F25. N 67.22000 2.93000 0481.37 48261 104 642 E 023 Rotary 03 000 0025 1-22. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-23R-2, Unit F25. N 67.22000 2.93000 0482.84 48283 104 642 E 023 Rotary 03 126 0013 23. DU DARK BROWN, FINE GRAINED TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Rounded lapilli of fine grained tuff. Contacts with adjacent units not recovered. Unit S13. N 67.22000 2.93000 0482.84 48409 104 642 E 023 Rotary 03 127 0026 24-28. DU MEDIUM-GRAINED, MODERATELY OLIVINE-PLAGIOCLASE PHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Moderate vesicularity, vesicles filled with dark green smectite. Unit F26. N 67.22000 2.93000 0482.84 48410 104 642 E 024 Rotary 01 000 0026 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-23R-3, Unit F26. N 67.22000 2.93000 0489.40 48939 104 642 E 024 Rotary 01 027 0014 All DU VERY DARK BROWN TUFF see comments see comments see comments see comments see comments see comments see comments see comments Unit S14. N 67.22000 2.93000 0489.40 48966 104 642 E 024 Rotary 01 030 0027 9-23. DU FINE-GRAINED,APHYRIC GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Locally microbrecciated flow top, with some pale green smectite-filled fractures. Most vesicles are dark green smectite filled. Moderately vesicular toward center of flow. Some rare rounded cognate xenoliths of highly vesicular, fine-grained aphyric gray basalt present. Fine basalt breccia at 25R-3, 76-79 cm. [Unrelated rubble at 642E-25R-1 (0-12cm)]. Unit F27. N 67.22000 2.93000 0489.40 48969 104 642 E 024 Rotary 02 000 0027 1A-2B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-24R-1, Unit F27. N 67.22000 2.93000 0490.90 49089 104 642 E 025 Rotary 01 000 0027 1-6B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-24R-1, Unit F27. N 67.22000 2.93000 0493.40 49339 104 642 E 025 Rotary 02 000 0027 1A-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-24R-1, Unit F27. N 67.22000 2.93000 0494.55 49454 104 642 E 025 Rotary 03 000 0027 1A-2. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-24R-1, Unit F27. N 67.22000 2.93000 0495.90 49589 104 642 E 025 Rotary 03 079 0015 All DU VERY DARK BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Tuff has lithic fragments of overlying breccia. Some slightly altered shards, light green and more vesicular black. Unit S15. N 67.22000 2.93000 0495.90 49668 104 642 E 025 Rotary 03 079 0028 8-11. DU FINE-GRAINED, PLAGIOCLASE PHYRIC GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Moderately to highly vesicular at flow top, streamed and coalesced. Some fracturing, subvertical. Streaking (flow fabric) from 26R-4, 95 cm, downsection, locally inclined, mainly subhorizontal. Xenolithic. 70 cm thick dark gray to dark brownish gray basal breccia. Unit F28. N 67.22000 2.93000 0495.90 49668 104 642 E 025 Rotary 04 000 0028 1-25. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-25R-3, UnitFF28. N 67.22000 2.93000 0497.32 49732 104 642 E 026 Rotary 01 000 0028 1A-7D. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-26R-1, Unit F28. N 67.22000 2.93000 0501.80 50179 104 642 E 026 Rotary 02 000 0028 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-25R-3, Unit F28. N 67.22000 2.93000 0503.26 50326 104 642 E 026 Rotary 03 000 0028 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-26R-3, Unit F28. N 67.22000 2.93000 0504.76 50476 104 642 E 026 Rotary 04 000 0028 1A-6E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-25R-3, Unit F28. N 67.22000 2.93000 0506.21 50620 104 642 E 026 Rotary 05 000 0028 1A-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-25R-3, Unit F28. N 67.22000 2.93000 0507.71 50770 104 642 E 027 Rotary 01 000 0028 1-6B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-25R-3, Unit F28. N 67.22000 2.93000 0511.20 51120 104 642 E 027 Rotary 02 000 0028 1-3B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-25R-3, Unit F28. N 67.22000 2.93000 0512.70 51270 104 642 E 027 Rotary 02 035 0016 4A-6. DU DARK RED BROWN TO PURPLE TUFFS AND SANDY TUFFS. see comments see comments see comments see comments see comments see comments see comments see comments Subhorizontally layered. Contains pebbles of basaltic breccia, some zones with fresh glass. Unit S16. N 67.22000 2.93000 0512.70 51305 104 642 E 027 Rotary 02 064 0029 7A-14. DU FINE-GRAINED, MODERATELY PLAGIOCLASE PHYRIC, DARK GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened scoriaceous breccia flow top, with vesicularity decreasing downsection, some streaming and coallescence of dark green smectite filled vesicles. Well developed streaking (flow fabric) from 28R-1, 0 cm, downward. True inclination of fabric locally up to 45 degrees. Rare xenoliths, basal vesicular zone, breccia and contact with S17 well preserved. Unit F29. N 67.22000 2.93000 0512.70 51334 104 642 E 027 Rotary 03 000 0029 1-18. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-27R-2, Unit F29. N 67.22000 2.93000 0514.07 51407 104 642 E 027 Rotary 04 000 0029 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-27R-2, Unit F29. N 67.22000 2.93000 0515.57 51557 104 642 E 027 Rotary 05 000 0029 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-27R-2, Unit F29. N 67.22000 2.93000 0516.98 51697 104 642 E 028 Rotary 01 000 0029 1-3C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-27R-2, Unit F29. N 67.22000 2.93000 0520.60 52059 104 642 E 028 Rotary 02 000 0029 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-27R-2, Unit F29. N 67.22000 2.93000 0521.50 52150 104 642 E 028 Rotary 03 000 0029 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-27R-2, Unit F29. N 67.22000 2.93000 0522.62 52261 104 642 E 028 Rotary 03 117 0017 6-7C. DU DARK BROWN TO BROWN SANDY BASALTIC VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Pale green spotting. Uniform shards slightly vesicular. Unit S17. N 67.22000 2.93000 0522.62 52378 104 642 E 028 Rotary 03 140 0030 8. DU MEDIUM- TO FINE-GRAINED, APHYRIC BLACK BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Fine grained and vesicular upper flow. Vesicles rimmed with green smectite, none filled. Crystallinity grades into medium grade lower in flow. Unit F30. N 67.22000 2.93000 0522.62 52401 104 642 E 028 Rotary 04 000 0030 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-28R-3, Unit F30. N 67.22000 2.93000 0524.09 52409 104 642 E 028 Rotary 04 016 0031 2-5. DU MEDIUM-GRAINED APHYRIC, BLACK BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Grades from glassy, highly vesicular flow top rapidly into medium-grain size. Open vesicles are coated with green smectite. Unit F31. N 67.22000 2.93000 0524.09 52425 104 642 E 028 Rotary 04 053 0032 6-13. DU AS UNIT 31. see comments see comments see comments see comments see comments see comments see comments see comments As Unit F31. Unit F32. N 67.22000 2.93000 0524.09 52462 104 642 E 028 Rotary 04 110 0033 14-17. DU AS UNIT 31. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 31. Unit F32. N 67.22000 2.93000 0524.09 52519 104 642 E 028 Rotary 05 000 0033 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments As 642E-28R-4, Unit F33. N 67.22000 2.93000 0525.51 52551 104 642 E 029 Rotary 01 000 0034 1-16. DU AS UNIT 31. see comments see comments see comments see comments see comments see comments see comments see comments As Unit F31. Noticeable high content of iddingsitized olivine(<10%).Unit F34. N 67.22000 2.93000 0530.00 53000 104 642 E 029 Rotary 01 103 0035 17-23. DU AS UNIT 31. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 31. N 67.22000 2.93000 0530.00 53103 104 642 E 029 Rotary 02 000 0035 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 31. N 67.22000 2.93000 0531.50 53150 104 642 E 030 Rotary 01 000 0036 1-7C. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow top not recorved. Locally highly vesicular at top of unit, but missing upper-most vesicular zone. Streamed vesicularity overlies thick streaky (flow laminated) section. Xenolithic and fractured with dark green smectite predominant in veins. Unit F36. N 67.22000 2.93000 0539.50 53950 104 642 E 030 Rotary 02 000 0036 All DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-30R-1, Unit F36. N 67.22000 2.93000 0540.84 54084 104 642 E 030 Rotary 03 000 0036 1-2E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-30R-1, Unit F36. N 67.22000 2.93000 0542.21 54221 104 642 E 030 Rotary 04 000 0036 1A-1E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-30R-1, Unit F36. N 67.22000 2.93000 0543.64 54364 104 642 E 030 Rotary 05 000 0036 1A-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-30R-1, Unit F36. N 67.22000 2.93000 0544.28 54428 104 642 E 030 Rotary 06 000 0036 1-12. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-30R-1, Unit F36. N 67.22000 2.93000 0545.78 54578 104 642 E 031 Rotary 01 000 0017 All DU BASALTIC VITRIC TUFF IN PLACE AS RUBBLE. see comments see comments see comments see comments see comments see comments see comments see comments Forms top of flow Unit 37. Unit S17A. N 67.22000 2.93000 0549.00 54900 104 642 E 031 Rotary 01 004 0037 1-12. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recorved. Reddened through upper section. As Unit F36, with streaking fabric wrapping and deflected by abundant xenoliths.Unit F37. N 67.22000 2.93000 0549.00 54904 104 642 E 031 Rotary 02 000 0037 1A-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-31R-1, Unit F37. N 67.22000 2.93000 0550.47 55046 104 642 E 031 Rotary 03 000 0037 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-31R-1, Unit F37. N 67.22000 2.93000 0551.92 55191 104 642 E 031 Rotary 04 000 0037 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-31R-1, Unit F37. N 67.22000 2.93000 0553.42 55341 104 642 E 031 Rotary 05 000 0037 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-31R-1, Unit 31. Unit F37. N 67.22000 2.93000 0554.83 55483 104 642 E 032 Rotary 01 027 0037 1-11. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base and flow top recovered. As Unit F36 and Unit F37, with streaking fabric wrapping and deflected by abundant xenoliths. Local cross-hatching of poorly developed fabric. This is Unit F37A. N 67.22000 2.93000 0558.40 55867 104 642 E 032 Rotary 02 000 0037 1-14. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-32R-2, Unit F37A. N 67.22000 2.93000 0559.82 55982 104 642 E 032 Rotary 03 000 0037 1-19. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-32R-3, Unit F37A. N 67.22000 2.93000 0561.22 56121 104 642 E 033 Rotary 01 000 0037 1-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-32R-1, Unit F37A. N 67.22000 2.93000 0564.90 56490 104 642 E 033 Rotary 01 136 0018 9. DU DARK RED BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Unit S18. N 67.22000 2.93000 0564.90 56626 104 642 E 033 Rotary 01 138 0038 10-11. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recorved. Reddened vesicular flow top. Patch smectite alternation throughout groundmass, some blue green smectite(celadonite?) vesicle filling. Olivine iddingsitized throughouUnit F38. N 67.22000 2.93000 0564.90 56628 104 642 E 033 Rotary 02 000 0038 1-21. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-33R-1, Unit F38. N 67.22000 2.93000 0566.37 56636 104 642 E 033 Rotary 03 000 0038 1-11. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-33R-1, Unit F38. N 67.22000 2.93000 0567.87 56786 104 642 E 033 Rotary 04 000 0038 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-33R-1, Unit F38. N 67.22000 2.93000 0569.32 56932 104 642 E 033 Rotary 05 000 0038 1-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-33R-1, Unit F38. N 67.22000 2.93000 0570.72 57071 104 642 E 034 Rotary 01 000 0018 A All DU BASALTIC VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments As rubble in place. This is Unit S18A. N 67.22000 2.93000 0574.40 57440 104 642 E 034 Rotary 01 018 0039 4-14. DU FINE-GRAINED, APHYRIC, GRAY, BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Flow base missing. Weakly reddened, highly vesicular upper section, locally brecciated. Streamed and coalesced vesicular zone. Subparallel, subhorizontal streaking (flow fabric) with tightening of fabric toward base of section. Iddingsitzation gives reddish hue to streaks. Slight increase in vesicularity at base, highly vesicular base missing. Unit F39. N 67.22000 2.93000 0574.40 57458 104 642 E 035 Rotary 01 000 0039 1-12. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-34R-1, Unit F39. N 67.22000 2.93000 0583.90 58390 104 642 E 035 Rotary 02 000 0039 1-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-34R-1, Unit F39. N 67.22000 2.93000 0584.99 58498 104 642 E 035 Rotary 02 106 0019 7. DU BRICK RED BROWN, UPWARD-FINING TUFF SEQUENCES. see comments see comments see comments see comments see comments see comments see comments see comments Three cycles, fresh glass at base of middle sequence. Basaltic fragment at base. Unit S19. N 67.22000 2.93000 0584.99 58604 104 642 E 035 Rotary 02 114 0040 8-13. DU MEDIUM-GRAINED, MODERATELY PLAGIOCLASE PHYRIC BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Reddish dark gray mottled with dark green smectitic alteration, moderately vesicular with some vesicles elongated or collapsed. Vertical openings into base of flow with smectite and breccia fillings. Unit F40. N 67.22000 2.93000 0584.99 58612 104 642 E 035 Rotary 03 000 0040 1-18. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-35R-2, Unit F40. N 67.22000 2.93000 0586.49 58648 104 642 E 035 Rotary 03 137 0041 19-20. DU MEDIUM-GRAINED, MODERATELY PLAGIOCLASE PHYRIC BASALT. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 40 with reddish gray groundmass color. Unit F41. N 67.22000 2.93000 0586.49 58785 104 642 E 035 Rotary 04 000 0041 1-12. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-35R-3, Unit F41. N 67.22000 2.93000 0587.99 58798 104 642 E 035 Rotary 04 115 0042 13-17. DU MEDIUM-GRAINED, MODERATELY PLAGIOCLASE PHYRIC BASALT. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 40, with reddish dark gray, fine-grained flow top. Unit F42. N 67.22000 2.93000 0587.99 58913 104 642 E 035 Rotary 05 000 0042 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-35R-4, Unit F42. N 67.22000 2.93000 0589.49 58948 104 642 E 036 Rotary 01 000 0042 All DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-35R-3, Unit F42. N 67.22000 2.93000 0593.40 59340 104 642 E 036 Rotary 01 004 0043 1-17. DU MEDIUM-GRAINED GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Purplish gray vesicular flow top, with vesicularity up to 15%. Rear phenocrysts of plagioclase and olivine(?) completely altered to secondary minerals. Some vesiclesfilled with dark green smectite and/or pale green celadonite. Unit F43. N 67.22000 2.93000 0593.40 59344 104 642 E 036 Rotary 02 000 0043 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-36R-1, Unit F43. N 67.22000 2.93000 0594.90 59490 104 642 E 036 Rotary 02 052 0044 6-18. DU MEDIUM-GRAINED GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 43. With black to purple basalvesicular zone. Contact preserved. Unit F44. N 67.22000 2.93000 0594.90 59542 104 642 E 036 Rotary 03 000 0044 1A-11. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-36R-2, Unit F44. N 67.22000 2.93000 0596.40 59640 104 642 E 037 Rotary 01 000 0044 1-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-36R-2, Unit F44. N 67.22000 2.93000 0602.80 60279 104 642 E 037 Rotary 01 000 0045 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-37R-1, Unit F45. N 67.22000 2.93000 0602.80 60279 104 642 E 037 Rotary 01 112 0045 7-11. DU MEDIUM-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Vesicular, with vesicles filled with calcite and/or zeolite. Locally light green smectite(?celadonite). Unit F45. N 67.22000 2.93000 0602.80 60391 104 642 E 038 Rotary 01 000 0046 All DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow top not recorved. Sparsely vesicular througout, except for highly vesicular flow base(38R-3, 140-150 cm). Vesicles filled with green smectite and/or calcite, subhorizontally elongated at 38R-3, 120-140 cm. Subhorizontal spaced streaking (flow lamination) gives way to massive base below 38R-3, 90 cm. Rounded zenoliths of vesicular, gray, aphyric basalt throughout. Steeply inclined or vertical fine smectite filled veins, narrow breccia zone at 38R-2, 32-50 cm. Fresh plagioclase laths are locally aligned, accompanied by fresh anhedral clinopyroxene, and smectite/iddingsite pseudomorphs after olivine. Unit F46. N 67.22000 2.93000 0612.20 61220 104 642 E 038 Rotary 02 000 0046 1A-1J. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-38R-1, Unit F46. N 67.22000 2.93000 0613.64 61364 104 642 E 038 Rotary 03 000 0046 1A-11. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-38R-1, Unit F46. N 67.22000 2.93000 0615.07 61507 104 642 E 038 Rotary 04 000 0047 1-11. DU FINE-GRAINED, APHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base and probably center not recovered. Upper part scoriaceous and brecciated, red to purplish gray, highly vesicular and gray below, vesicles rimmed or smectite filled. Olivine completely iddingsitized, abundant Fe oxides. Unit F47. N 67.22000 2.93000 0616.53 61653 104 642 E 039 Rotary 01 000 0047 A 1-3. DU FINE-GRAINED, APHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments As F47. This is Unit F47A. N 67.22000 2.93000 0621.60 62159 104 642 E 040 Rotary 01 000 0048 1-4. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow top not recovered. Moderately to sparsely vesicular throughout, with green smectite and/or calcite filling. Subhorizontal spaced streaking (flow fabric) down to 40R-1, 100 cm. Fine fracturing 75-90 cm, with calcite and smectite filled veins near base of flow. Unit F48. N 67.22000 2.93000 0631.10 63109 104 642 E 040 Rotary 02 000 0048 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-40R-1, Unit F48. N 67.22000 2.93000 0632.60 63259 104 642 E 040 Rotary 02 040 0020 8. DU DARK RED BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains irregular vesicular fragments from the underlying flow. Unit S20. N 67.22000 2.93000 0632.60 63299 104 642 E 040 Rotary 02 046 0049 9-27. DU FINE-GRAINED, APHYRIC GRAY BASALT FLOW WITH REDDENED FLOW TOP. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recorved. Moderately to sparsely vesicular throughout with smectite and locally calcite filling; some vesicles flattened toward base. Horizontal spaced streaking (flow fabric) below 40R-3, 85 cm, locally chaotic. Some subvertical hairline fracturing is smectite filled, one example 4 mm at wide, 40R-3, 30-85 cm.Unit F49. N 67.22000 2.93000 0632.60 63305 104 642 E 040 Rotary 03 000 0049 1-19. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-40R-2, Unit F49. N 67.22000 2.93000 0634.10 63409 104 642 E 041 Rotary 01 000 0049 A 1-4A. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW WITH REDDENED FLOW TOP. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 49. This is Unit F49A. N 67.22000 2.93000 0640.60 64059 104 642 E 041 Rotary 01 103 0050 All DU FINE-GRAINED, SPARSELY PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Scoriaceous, highly vesicular reddened flow top, moderately vesicular to vesicular gray center and base. Dark green smectite filled vertical or irregularly "streamed" vesicle trains. Subhorizontal streaking (flow fabric) between 41R-3, 0-62 cm. Several subvertical or steeply inclined smectite filled fine fractures. Unit F50. N 67.22000 2.93000 0640.60 64162 104 642 E 041 Rotary 02 000 0050 1-20. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-41R-1, Unit F50. N 67.22000 2.93000 0642.10 64209 104 642 E 041 Rotary 03 000 0050 1-9. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-41R-1, Unit F50. N 67.22000 2.93000 0643.60 64359 104 642 E 041 Rotary 03 085 0051 10-19. DU FINE-GRAINED, SPARSELY PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recveered. Sparsely vesicular to vesicular, green smectite and calcite filled vesicles. Subhorizontal streaking (flow fabric) between 41R-4, 55 cm, and 42R-1, 48 cm. Some fine (<1 mm) subvertical fracturing with smectite filling. Unit F51. N 67.22000 2.93000 0643.60 64444 104 642 E 041 Rotary 04 000 0051 1-12B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-41R-3, Unit F51. N 67.22000 2.93000 0645.10 64509 104 642 E 042 Rotary 01 000 0051 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-41R-3, Unit F51. N 67.22000 2.93000 0650.10 65009 104 642 E 042 Rotary 01 049 0021 6-11. DU BASALTIC VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Dark brown, dark gray brown, grayish red brown, brownish green, well sorted, upward-fining sequence at 42R-1, 49-62 cm; variable content of lapilli of defferentiated composition: heterogeneous tuff, pale green vitric tuff, yellowish brown, crystal rich tuff, fragments of accretionary lapilli. Unit S21. N 67.22000 2.93000 0650.10 65058 104 642 E 042 Rotary 01 121 0052 12-17. DU FINE-GRAINED, APHYRIC, DARK GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recorved. Moderately to sparsely vesicular, upper section vesicles open or rimmed with pale green smectite, lower section filled with dark green smectite. Between 42R-2, 66-102 cm, steeply inclined sigmoidal tension gash arrays suggests shear motion approximately parallel to two fabric.Unit F52. N 67.22000 2.93000 0650.10 65130 104 642 E 042 Rotary 02 000 0052 1-17. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-42R-1, Unit F52. N 67.22000 2.93000 0651.60 65159 104 642 E 042 Rotary 03 000 0052 All DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-42R-1, Unit F52. N 67.22000 2.93000 0653.04 65303 104 642 E 045 Rotary 01 000 0022 1-15. DU THREE UPWARD-FINING SEQUENCES OF DARK BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains fresh black shards in the top sequence, and gray-green lapilli in the middle. 45R-1, 27-78 cm, dark brown tuff mixed with vesicular blocks of top of underlying flow. Unit S22. N 67.22000 2.93000 0678.60 67859 104 642 E 045 Rotary 01 078 0053 16-27. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Dark gray scoriaceous flow top breccia with pale green coating of vesicles. Highly vesicular lower top. Vesicles locally streamed and filled with dark green smectite. Thick central section streaky with well developed flow fabric, locally random with tightening of fabric toward base accompanied by some subhorizontal elongation of vesicles. Rounded xenoliths of vesicular basalt occur sporadically throughout the unit. Steeply inclined smectite and calcite filled fractures common. Gray to reddish gray basal breccia with reddish brown, fine-grained tuffaceous(?) matrix. Unit F53. N 67.22000 2.93000 0678.60 67937 104 642 E 045 Rotary 02 000 0053 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0680.03 68003 104 642 E 045 Rotary 03 000 0053 1A-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0681.38 68138 104 642 E 045 Rotary 04 000 0053 1A-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0682.74 68273 104 642 E 045 Rotary 05 000 0053 All DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0684.02 68402 104 642 E 046 Rotary 01 000 0053 1A-1E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0688.10 68809 104 642 E 046 Rotary 02 000 0053 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0689.51 68951 104 642 E 046 Rotary 03 000 0053 1A-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0691.01 69101 104 642 E 046 Rotary 04 000 0053 1-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-45R-1, Unit F53. N 67.22000 2.93000 0692.51 69251 104 642 E 047 Rotary 01 000 0022 All DU DARK BROWN BASALTIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments This is Unit S22A. N 67.22000 2.93000 0697.60 69759 104 642 E 047 Rotary 01 002 0054 1-15. DU FINE-GRAINED, APHYRIC, GRAY BASALTIC FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Moderate vesicularity, decreasing in central section. Streaky flow fabric in the flow center. Drilling terminated with jammed bit. Unit F54. N 67.22000 2.93000 0697.60 69761 104 642 E 047 Rotary 01 136 0023 All DU DARK BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Unit S23. N 67.22000 2.93000 0697.60 69895 104 642 E 047 Rotary 01 137 0055 All DU FRAGMENTS OF FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Unit F55. N 67.22000 2.93000 0697.60 69896 104 642 E 048 Rotary 01 000 0056 1. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Vesicles are smectite filled, and elongate at base. Streaky flow fabric is chaotic in upper section, subhorizontal in lower. Subvertical fracturing. Some reddening of fragments at base of unit. Unit F56. N 67.22000 2.93000 0707.10 70709 104 642 E 050 Rotary 01 000 0056 1A-2I. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-48R-1, Unit F56. N 67.22000 2.93000 0716.60 71659 104 642 E 050 Rotary 02 000 0056 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-48R-1, Unit F56. N 67.22000 2.93000 0718.07 71807 104 642 E 050 Rotary 02 032 0024 6-12. DU DARK BROWN VITRIC, BASALTIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains platy, vesicular, glass shards, some fresh, as well as clinopyroxene and feldspar; median shard diameter 0.Unit S24. N 67.22000 2.93000 0718.07 71839 104 642 E 051 Rotary 01 000 0057 1A-4. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Massive, sparsely vesicular. Vertical to subvertical fracture set. Unit F57. N 67.22000 2.93000 0723.30 72329 104 642 E 052 Rotary 01 000 0057 A 1-9. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened vesicular flow top breccia, with moderate to highly vesicular basalt section, but mostly nonvesicular or sparsely vesicular, filled with dark green smectite or rare calcite. Streaky flow fabric well developed below 52R-2, 80 cm. Local fine subvertical fracturing. A series of continuous, subvertical arcuate veins, maximum width 4 mm with smectite filling between 52R-1, o cm, and 52R-2, 50 cm. Rounded vesicular xenoliths, 0.5-1.5 cm diameter, occur sporadically throughout unit, and are locally wrapped by flow fabric. Unit F57A. N 67.22000 2.93000 0723.80 72379 104 642 E 052 Rotary 02 000 0057 A 1A-2C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-52R-1, Unit F57A. N 67.22000 2.93000 0725.12 72511 104 642 E 052 Rotary 03 000 0057 A 1A-1E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-52R-1, Unit F57A. N 67.22000 2.93000 0726.42 72641 104 642 E 052 Rotary 04 000 0057 A 1A-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-52R-1, Unit F57A. N 67.22000 2.93000 0727.87 72786 104 642 E 052 Rotary 04 109 0025 All DU DARK RED BROWN, HOMOGENEOUS, BASALTIC, VITRIC TUFF see comments see comments see comments see comments see comments see comments see comments see comments Present only as matrix between breccia clasts in flow top and base. Unit S25. N 67.22000 2.93000 0727.87 72895 104 642 E 052 Rotary 04 109 0058 7-13. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened, highly vesicular basalt breccia with fine tuff matrix overlying thick (2.0 m) highly vesicular streamed and coalesced zone, vesicles with dark green smectite fillings. 2.8 m thick recorvery of subhorizontally streaked (flow fabric) central zone, carrying few elongate vesicles subparallel to fabric. Rare, rounded, vesicular, aphyric, gray basalt xenoliths throughout unit, vertical fracturing and smectite veining occupies partings up to 1.0 mm wide, some subparallel to flow fabric. Unit F58. N 67.22000 2.93000 0727.87 72895 104 642 E 052 Rotary 05 000 0058 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-52R-4, Unit F58. N 67.22000 2.93000 0729.37 72936 104 642 E 053 Rotary 01 000 0058 1-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-52R-4, Unit F58. N 67.22000 2.93000 0729.20 72920 104 642 E 053 Rotary 02 000 0058 1A-18. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-52R-4, Unit F58. N 67.22000 2.93000 0730.70 73070 104 642 E 053 Rotary 03 000 0058 1-11. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description 642E-52R-4, Unit F58. N 67.22000 2.93000 0732.20 73220 104 642 E 054 Rotary 02 062 0026 5A-11. DU RED-BROWN, BASALTIC, VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Subhorizontal bedding common, with at least one upward-fining sequence (54R-2, 67-74 cm). Sandy interval overlies zone of lapilli-sized clasts and basal breccia. Some pocket infilling of underlying basalt flow top. Unit S26. N 67.22000 2.93000 0740.20 74082 104 642 E 054 Rotary 02 110 0059 12-21. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened flow top breccia with highly vesicular "streamed" upper zone, overlying moderately to sparsely vesicular unit. Most vesicles filled by dark green smectite, rare calcite, and some zeolite, especially Pieces 11A and B. Shallowly inclined (20 degrees) or subhorizontal streaky flow fabric through central and basal section except for highly vesicular base. Weak flattening/truncation of vesicles by fabric. Rare rounded, highly vesicular basalt xenoliths. Unit F59. N 67.22000 2.93000 0740.20 74130 104 642 E 054 Rotary 03 000 0059 1-12. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-54R-2, Unit F59. N 67.22000 2.93000 0741.70 74170 104 642 E 054 Rotary 04 000 0059 1-9E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-54R-2, Unit F59. N 67.22000 2.93000 0743.08 74308 104 642 E 055 Rotary 01 000 0059 A 1-4I. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments As 642E-54R-2, Unit F59. N 67.22000 2.93000 0748.20 74820 104 642 E 055 Rotary 02 000 0059 A 1-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-55R-2, Unit F59. This is Unit F59A. N 67.22000 2.93000 0749.64 74964 104 642 E 055 Rotary 02 085 0027 All DU BASALTIC VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Uniformly dark red brown, pocket fillings of underlying flow top down to 55R-2, 143 cm. Unit S27. N 67.22000 2.93000 0749.64 75049 104 642 E 055 Rotary 02 088 0060 6-15. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOWS. see comments see comments see comments see comments see comments see comments see comments see comments Central section possibly not recorved. Reddened and scoriaceous flow top breccia overlying moderately vesicular zone with dark green smectite fillings. Some entrainment of vesicles into inclined zones in lower sections. No streaked flow fabric recognized, but suspect from drilling logs that much of the central zone may be missing. Rare xenoliths are present, along with a few fine smectite filled fractures. Unit F60. N 67.22000 2.93000 0749.64 75052 104 642 E 055 Rotary 03 000 0060 1-16. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-55R-3, Unit F60. N 67.22000 2.93000 0751.14 75114 104 642 E 056 Rotary 01 000 0060 1A-1C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-55R-2, Unit F60. N 67.22000 2.93000 0757.60 75759 104 642 E 057 Rotary 01 000 0060 1A-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-55R-2, Unit F60. N 67.22000 2.93000 0759.10 75909 104 642 E 057 Rotary 01 128 0028 6. DU DARK RED BROWN BASALTIC, VTRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Uniformly grained. Extends down to pocket fillings of underlying flow at 57R-2, 50 cm. Unit S28. N 67.22000 2.93000 0759.10 76037 104 642 E 057 Rotary 01 130 0061 7-10. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments A 2.0 m thick red scoriaceous and highly vesicular breccia flow top containing some vesicles with smectite fills. Moderately vesicular for most of the unit, with local collapsed and/or filled vesicles deformed into sigmoidal shapes, aligned into en echelon arrays. Toward the base are several steeply inclined to vertical smectite-filled fractures along with some complex braided partings. Rounded and subrounded, vesicular, aphyric xenoliths occur locally.Unit F61. N 67.22000 2.93000 0759.10 76039 104 642 E 057 Rotary 02 000 0061 1-15. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0760.60 76059 104 642 E 057 Rotary 03 000 0061 1-16. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0762.10 76209 104 642 E 057 Rotary 04 000 0061 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0763.60 76359 104 642 E 058 Rotary 01 000 0061 1-2F. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0766.10 76609 104 642 E 058 Rotary 02 000 0061 1A-4C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0767.55 76754 104 642 E 058 Rotary 03 000 0061 1A-2B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0768.86 76885 104 642 E 058 Rotary 04 000 0061 1A-4B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0770.26 77026 104 642 E 058 Rotary 05 000 0061 1A-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-57R-1, Unit F61. N 67.22000 2.93000 0771.72 77171 104 642 E 059 Rotary 01 000 0062 1-26. DU FINE-GRAINED, APHYRIC, BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow basalt not recveered. Reddened flow top breccia, carrying vesicular fragments up to 5 cm in diameter, overlying sparsely vesicular unit, with vesicles filled with green smectite. Upper streaky flow fabric subhorizontal, but locally chaotic toward lowest recovered section. Rare xenoliths. Much fracturing and subvertical partings toward base with dark green smectite and celadonite(?) fillgs. Unit F62. N 67.22000 2.93000 0775.50 77550 104 642 E 059 Rotary 02 000 0062 1A-11. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description 642E-59R-1, Unit 62. N 67.22000 2.93000 0776.95 77695 104 642 E 059 Rotary 03 000 0062 1A-15. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-59R-1, Unit F62. N 67.22000 2.93000 0778.32 77832 104 642 E 059 Rotary 04 000 0062 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-59R-1, Unit F62. N 67.22000 2.93000 0779.82 77982 104 642 E 060 Rotary 01 000 0063 1-19D. DU FINE-GRAINED, APHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow top and base not recovered. Weakly red gray at top of unit over moderately vesiciualr zone, displaying coalescence of vesicles, alignment and preservation of interconnecting channels in locally intensely vesicular zones. Well-developed streaking fabric 60R-2, 60-120 cm. Some vertical fracturing in Piece 9A. Unit F63. N 67.22000 2.93000 0784.90 78490 104 642 E 060 Rotary 02 000 0063 1A-16. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-60R-1, Unit F63. N 67.22000 2.93000 0786.36 78635 104 642 E 061 Rotary 01 000 0064 1-12E. DU FINE-GRAINED, APHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Gray and dark gray highly vesicular flow top breccia, with some pale green smectite alternation. Moderately to highly vesicular, dark green smectite-filled "streamed" upper section, sparsely vesicular below 61R-1, 110 cm. Subparallel to flattened vesicles. Abundant highly vesicular, aphyric basalt xenoliths present, especially at 61R-1, 70-100 cm. Unit F64. N 67.22000 2.93000 0794.30 79429 104 642 E 061 Rotary 02 000 0064 1-15. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-61R-1, Unit F64. N 67.22000 2.93000 0795.80 79579 104 642 E 061 Rotary 02 128 0065 16. DU MEDIUM-GRAINED, APHYRIC, DARK GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Vesicular, with average grain sizes ranging between 2.0 and 8.0 mm in diameter; vesicles, mostly dark green smectite filled, some with pale green cores. Unit F65. N 67.22000 2.93000 0795.80 79707 104 642 E 062 Rotary 01 000 0065 B 1-3. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-61R-2, Unit F65B. N 67.22000 2.93000 0803.80 80379 104 642 E 062 Rotary 01 017 0066 4-25. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Weakly reddened to gray unit, highly vesicular, ranging from upper zones of green smectite rims to complete fills in lower zones. No streaky flow fabric recognized, but some local mixed turbulent(?) zones in Pieces 14, 17, and 18. Unit F66. N 67.22000 2.93000 0803.80 80396 104 642 E 063 Rotary 01 000 0067 1-15C. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened vesicular breccia flow top overlying sparsely vesicular unit. Narrow vesicular base, carrying flattened vesicles in several bands, 64R-4, 53-103 cm. Well rccovered streaky flow with a zone of randomly orientated fabric at 64R-1, 25-64 cm. Several subvertical fractures filled with green smectite with some calcite, locally offsetting flow fabric. Native copper as dissenminated blebs in groundmass and in lower veins, along with trace of unidentified metallic mineral. Unit F67. N 67.22000 2.93000 0809.80 80979 104 642 E 063 Rotary 02 000 0067 1A-1E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-63R-1, Unit F67. N 67.22000 2.93000 0811.03 81103 104 642 E 063 Rotary 03 000 0067 1-2C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description 642E-63R-1, Unit F67. N 67.22000 2.93000 0812.53 81253 104 642 E 063 Rotary 04 000 0067 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description 642E-63R-1, Unit F67. N 67.22000 2.93000 0814.03 81403 104 642 E 064 Rotary 01 000 0067 1A-1F. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-63R-1, Unit F67. N 67.22000 2.93000 0815.80 81579 104 642 E 064 Rotary 02 000 0067 1A-1H. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-63R-1, Unit F67. N 67.22000 2.93000 0817.30 81729 104 642 E 064 Rotary 03 000 0067 1A-1E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-63R-1, Unit F67. N 67.22000 2.93000 0818.80 81879 104 642 E 064 Rotary 04 000 0067 1A-11. DU CONTINUED see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-63R-1, Unit F67. N 67.22000 2.93000 0820.18 82017 104 642 E 064 Rotary 04 103 0068 12-18. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened, highly vesicular unit, underlying fine breccia top(3 cm), with unfilled vesicles, or with partly filled vesicles containing green smectite and/or calcite. Size of vesicles descreases toward base. Sharp basal contact with Unit F69. This is unit F68. N 67.22000 2.93000 0820.18 82120 104 642 E 064 Rotary 05 000 0068 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-64R-4, Unit F68. N 67.22000 2.93000 0821.68 82167 104 642 E 064 Rotary 05 010 0069 2-21. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened and vesicular top. As Unit F68, except for well defined alternating zones of varying vesicle size. Vesicles in breccia zone are pale green and smectite filled. Unit F69. N 67.22000 2.93000 0821.68 82177 104 642 E 065 Rotary 01 000 0070 1-14. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recovered. Highly vesicular toward top, ranging down to sparsely vesicular in bottom section. Pale gray green smectite filled with some Fe oxide staining around vesicles and subvertical fine fracturing. Narrow streaky flow fabric zone at 65R-1, 46-64 cm. Unit F70. N 67.22000 2.93000 0825.20 82520 104 642 E 065 Rotary 01 064 0029 14. DU FINE-GRAINED, DARK RED BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Coating on vesicular top of Unit F71. Unit S29. N 67.22000 2.93000 0825.20 82584 104 642 E 065 Rotary 01 064 0071 15-24. DU FINE-GRAINED, APHYRIC, GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Flow base possibly not fully recovered. Highly vesicular, brown gray breccia pebbles at top with moderate vesicularity toward center and base. Some vesicle coalescence into streakUnit F71. N 67.22000 2.93000 0825.20 82584 104 642 E 065 Rotary 01 112 0072 25-28. DU FINE-GRAINED, SPARSELY PLAGIOCLASE PHYRIC, GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Brown to purplish gray vesicular flow top breccia(<1.0 m thick), vesicles showing pale green smectite rims. Moderately to sparsely vesiclar below. Plagioclase phenocrysts 1.0-2.0 mm in diameter throughout. Well developed streaky flow fabric between 66R-1, 75 cm, and 66R-4, 67 cm, except for massive zone at 66R-3, 30-90 cm. Fracturing common, celadonite(?) forms part of vein fill in 66R-4, Piece 6. Copper in vein at 66R-2, 23 cm.Unit 72. N 67.22000 2.93000 0825.20 82632 104 642 E 066 Rotary 01 000 0072 1-11C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-65R-1, Unit F72. N 67.22000 2.93000 0834.70 83470 104 642 E 066 Rotary 02 000 0072 1A-1K. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-65R-1, Unit F72. N 67.22000 2.93000 0836.06 83605 104 642 E 066 Rotary 03 000 0072 1A-13. DU CONTINED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-65R-1, Unit F72. N 67.22000 2.93000 0837.51 83751 104 642 E 066 Rotary 04 000 0072 1-9. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-65R-1, Unit F72. N 67.22000 2.93000 0839.01 83901 104 642 E 067 Rotary 01 000 0030 1. DU DARK RED BROWN LITHIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains some vesicular basaltic clasts < 2 mm diameter, without vitric clasts. Contains clasts of quartz, mica and clinopyroxene. Unit S30. N 67.22000 2.93000 0844.20 84420 104 642 E 067 Rotary 01 005 0073 2-20. DU MEDIUM-GRAINED, APHYRIC, DARK GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Weakly reddened to dark gray, vesicular throughout, and locally coalesced. Vesicles unfilled or with green smectite rims.Unit F73. N 67.22000 2.93000 0844.20 84425 104 642 E 067 Rotary 01 081 0074 21-32. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments As Unit F73, except for moderate vesicularity at 67R-2, 25-75 cm, and celadonite(?) filling in vesicles at 67R-2, 25 cm Unit F74. N 67.22000 2.93000 0844.20 84501 104 642 E 067 Rotary 02 000 0074 1-29. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-67R-1, Unit F74. N 67.22000 2.93000 0845.70 84570 104 642 E 068 Rotary 01 000 0074 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-67R-1, Unit F74. N 67.22000 2.93000 0853.70 85370 104 642 E 068 Rotary 01 006 0075 2-21. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow top and flow base not recorved. Vesicularity ranges from highly vesicular in top half of section to moderate from 68R-1, 42 cm, downward. Some coalescence and streaming in upper section, dark green smectite fills throughout. Complex subvertical fracturing in Piece 17. Weak, diffuse streaking (flow fabric) developing below 68R-1, 42 cm. Unit F75. N 67.22000 2.93000 0853.70 85376 104 642 E 068 Rotary 01 100 0076 22-29. DU MEDIUM-GRAINED, APHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Red gray throughout, except for gray at very base. Moderate to highly vesicular, either rimmed or filled with dark green smectite, some smectite patch alteration, which does not exceed 5%. Iddingsitized olivine. Unit F76. N 67.22000 2.93000 0853.70 85470 104 642 E 068 Rotary 02 000 0076 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-68R-1, Unit F76. N 67.22000 2.93000 0855.20 85520 104 642 E 068 Rotary 02 060 0077 14-26. DU MEDIUM-GRAINED, APHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Purplish gray at top, grading down to gray at base. Moderately vesicular throughout. Vesicules mostly unfilled, but rimmed with green smectite, locally blue-green celadonite Unit F77. N 67.22000 2.93000 0855.20 85580 104 642 E 069 Rotary 01 000 0078 1-16C. DU MEDIUM-GRAINED, APHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened through top of section, moderately vesicular, with smectite rimmed vesicles in upper 78 cm. Nonvesicular central zone. Lower 120 cm is moderately vesicular and has dark green smectite fillings. Iddingsitization of olivines extensive, smectitic patchy alterations. Copper disseminated through groundmass, or concentrated as blebs in smectite veins in subvertical partings. Sharp basal contact of flow between highly vesicular basalt and tuff S31. Unit F78. N 67.22000 2.93000 0863.20 86320 104 642 E 069 Rotary 02 000 0078 1A-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-69R-1, Unit F78. N 67.22000 2.93000 0864.58 86458 104 642 E 069 Rotary 02 120 0031 5-6. DU DARK RED BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Crystal, lithic, vitric tuff, containing aegirine-augite feldspar crystals, mica, and quartz. Contacts with Unit F78 and Unit F79 recovered. Unit S31. N 67.22000 2.93000 0864.58 86578 104 642 E 069 Rotary 02 125 0079 7A-7B. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Highly vesicular gray flow top of collapsed vesicles with green smectite matrix. Moderately vesicular coalesced and streamed vesicle zone, filled with dark green smectite. Single example of zeolite fill at 69R-3, 126 cm, and vesicle flattening between 70R-1, 40 and 50 cm. Basal increase in vesicularity, some streaming and irregular flow pattern. Streaky flow fabric well developed in central zone, tightly spaced toward base. Unit F79. N 67.22000 2.93000 0864.58 86583 104 642 E 069 Rotary 03 000 0079 1-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-69R-2, Unit F79. N 67.22000 2.93000 0866.08 86608 104 642 E 069 Rotary 04 000 0079 1. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-69R-2, Unit F79. N 67.22000 2.93000 0867.52 86752 104 642 E 070 Rotary 01 000 0079 1A-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-69R-2, Unit F79. N 67.22000 2.93000 0872.70 87270 104 642 E 070 Rotary 01 088 0080 9-15. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Possibly missing center and base. Reddened vesicular flow top, with streamed, coalesced, collapsed vesicles containing dark green smectite fill. Low-angle, inclined streaking (flow fabric) dies out to massive section form at base of recovery. Unit F80. N 67.22000 2.93000 0872.70 87358 104 642 E 070 Rotary 02 000 0080 1A-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-70R-1, Unit F80. N 67.22000 2.93000 0873.89 87389 104 642 E 071 Rotary 01 000 0081 1A-1J. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Top and central flow not recovered. Sparsely vesicular except for lowest 50 cm, moderately to highly vesicular, filled with green smectite throughout. Flattened vesicles subparallel to fabric at 71R-2, 47-50 cm. Streaky flow fabric well developed from top of recovery almost to base, generally shallowly inclined. Basal contact with Unit S32 shows slight purplish-gray alteration. Unit F81. N 67.22000 2.93000 0880.70 88070 104 642 E 071 Rotary 02 000 0081 1A-6. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642R-71R-1, Unit F81. N 67.22000 2.93000 0882.20 88220 104 642 E 071 Rotary 02 056 0032 All DU RED BROWN, VITRIC, BASALTIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains vesicular, cuneiform shards, including 10% palagonitic black glass. <5% lithic fragments comprised of basaltic clasts from the underlying flow, as well as 2% feldspar and traces of quartz grains. Unit S32. N 67.22000 2.93000 0882.20 88276 104 642 E 071 Rotary 02 058 0082 7-16C. DU FINE-GRAINED, APHYRIC, BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Isolated purple coloration at top of unit. Vesicular smectite filled zone, becoming sparse and not streamed with depth. In lowest 90 cm of flow, increasing vesicularity, then development of polymictic breccia of vesicular fragments of mixed base and underlying flow top. Streaking (flow fabric) well developed, sub-horizontally inclined for much of unit, with discrete chaotic zone. Several subrounded vesicular, aphyric basalt xenoliths present. Local vertical/subvertical fracture sets toward base of flow. Unit F82. N 67.22000 2.93000 0882.20 88278 104 642 E 071 Rotary 03 000 0082 1A-2B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-71R-2, Unit F82. N 67.22000 2.93000 0883.70 88370 104 642 E 071 Rotary 04 000 0082 1A-16. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-71R-2, Unit F82. N 67.22000 2.93000 0885.02 88502 104 642 E 072 Rotary 01 000 0082 1-17. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-71R-2, Unit F82. N 67.22000 2.93000 0890.10 89009 104 642 E 072 Rotary 01 071 0083 18-31 DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base not recovered. Slightly reddened flow top breccia, with dark green smectite matrix, to highly vesicular blocks. Moderately vesicular and gray at base of unit, some local streaming of green smectite filled vesicles. Few xenoliths, iddingsitized olivie. Unit F83. N 67.22000 2.93000 0890.10 89080 104 642 E 072 Rotary 02 000 0083 1-9. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-72R-1, Unit F83. N 67.22000 2.93000 0891.50 89150 104 642 E 073 Rotary 01 000 0084 1-29. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Base not recovered. Highly vesicular and brecciated top, with slight purple coloration. Vesicles with predominatly dark green smectite and subordinate calcite fillings. Zone of calcite veining and cavity fill in 73R-1, 107-135 cm. Excellent section of streaky flow fabric, including chaotic zone, 74R-1, 75 cm to 74R-3, 85 cm. Lowest 70 cm of unit unstreaked and increasingly vesicular and xenolith rich. Xenoliths common throughout flow, abundant in chaotic fabric zone. Unit F84. N 67.22000 2.93000 0896.30 89629 104 642 E 073 Rotary 02 000 0084 1A-2E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0897.71 89771 104 642 E 073 Rotary 03 000 0084 1A-3B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0899.09 89909 104 642 E 073 Rotary 04 000 0084 1A-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0900.48 90047 104 642 E 074 Rotary 01 000 0084 1-3B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0902.40 90240 104 642 E 074 Rotary 02 000 0084 1A-1E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0903.88 90388 104 642 E 074 Rotary 03 000 0084 1A-1F. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0905.24 90523 104 642 E 074 Rotary 04 000 0084 All DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0906.58 90658 104 642 E 074 Rotary 05 000 0084 1A-5C. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0908.03 90803 104 642 E 074 Rotary 06 000 0084 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-73R-1, Unit F84. N 67.22000 2.93000 0909.48 90947 104 642 E 074 Rotary 06 072 0085 7. DU FINE-GRAINED, MODERATELY PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened and vesicular rubbly basalt fragments throughout. Most vesicles filled with dark green smectite, few zeoliths, some coalesced toward base(?). Plagioclase laths 0.6-0.8 mm in length, locally clustered and fresh. Unit F85. N 67.22000 2.93000 0909.48 91019 104 642 E 075 Rotary 01 000 0085 1-26. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-74R-6, Unit F85. N 67.22000 2.93000 0911.90 91190 104 642 E 075 Rotary 01 038 0033 10. DU VERY DARK BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains white feldspar specks, containing lithics (basaltic), laminated redeposited(?) tuffs, quartz, feldspar, and possibly micas. Contact with Unit F85 missing, with Unit F86 recovered. Pocket infilling down to 75R-1, 107 cm. Unit S33. N 67.22000 2.93000 0911.90 91228 104 642 E 075 Rotary 01 045 0086 11-26. DU FINE-GRAINED, SPARSELY PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Base (and center?) not recrvered. Reddish brown gray top breccia containing scoriaceous and highly vesicular fragments with tuff matrix and fill. 1% plagioclase phenocrysts < 2 mm diameter. Moderate to highly vesicular throughout, all dark green smectite filled. Weakly developed streaky flow fabric. Unit F86. N 67.22000 2.93000 0911.90 91235 104 642 E 075 Rotary 02 000 0086 1-26. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-75R-1, Unit F86. N 67.22000 2.93000 0913.40 91340 104 642 E 076 Rotary 01 000 0087 1-25C. DU MEDIUM-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Weakly reddened throughout, highly vesicular between 76R-1, 10 cm, and 76R-1, 110 cm. Olivines iddingsitized. Unit F87. N 67.22000 2.93000 0921.40 92140 104 642 E 076 Rotary 02 000 0087 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-76R-1, Unit F87. N 67.22000 2.93000 0922.80 92279 104 642 E 076 Rotary 02 075 0088 6-12. DU MEDIUM-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Slight reddening at top with iddingsitized olivines. Moderately vesicular with vesicles mostly filled or rimmed as above, elongated in 76R-2, Piece 10. Minor fracturing. Unit F88. N 67.22000 2.93000 0922.80 92354 104 642 E 077 Rotary 01 000 0088 1-2. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-76R-2, Unit F88. N 67.22000 2.93000 0930.90 93090 104 642 E 077 Rotary 01 013 0034 3-8. DU DARK BROWN VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Mostly containing coarse ash particles, with larger clasts vitric and vesicular black to pale green in color. Subhorizontal orientation of clasts, some collapsed pumice fragments. Contact with Unit F89 recovered. Unit S34. N 67.22000 2.93000 0930.90 93103 104 642 E 077 Rotary 01 047 0089 9-15. DU FINE-GRAINED, APHYRIC TO SPARSELY PYROXENE-PLAGIOCLASE PHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Flow base and probably much of the center missing. Locally reddish brown flow top breccia of subrounded vesicular fragments, vesicles filled with light green and medium green smectites; celadonite(?)/saponite. Sparsely vesicular lower section, with weak streaky flow fabric. Plagioclase phenocrysts tending to glomeroporphyritic. Unit F89. N 67.22000 2.93000 0930.90 93137 104 642 E 077 Rotary 02 000 0089 1-15. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-77R-1, Unit F89. N 67.22000 2.93000 0932.40 93240 104 642 E 077 Rotary 03 000 0089 1-14. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-77R-1, Unit F89. N 67.22000 2.93000 0933.76 93376 104 642 E 078 Rotary 01 000 0090 2-27. DU FINE-GRAINED, SPARSELY PYROXENE-PLAGIOCLASE PHYRIC BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Base and possibly much of center not recovered. Highly vesicular upper section, decreasing downward. Some irregular shaped and streamed vertically and collapsed, filled or partly filled with dark green smectite. Phenocrysts as in Unit 89. Flow fabric streaking poorly developed but horizontal to base of recovery. Some rounded vesicular xenoliths, subvertical fracturing with green smectite filling. Unit F90. N 67.22000 2.93000 0940.40 94040 104 642 E 078 Rotary 02 000 0090 1-15. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-78R-1, Unit F90. N 67.22000 2.93000 0941.79 94178 104 642 E 079 Rotary 01 000 0091 1-23. DU MIXED FINE-GRAINED AND MEDIUM-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Top probably not recovered. Fine-grained and medium-grained basalt layers disposed in sharply defined bands, contrasting grain size and vesicularity: 20-40% in mediums, 3-10% in fines. Vesicles locally show strong elongation in fine bands and close to basal contact. Dark green smectite filling throughout. Base is dark gray to dark reddened gray, highly vesicular to pumiceous 1 cm of glass. Unit F91. N 67.22000 2.93000 0949.90 94990 104 642 E 079 Rotary 01 124 0092 24-28. DU MIXED FINE-GRAINED AND MEDIUM-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Slightly reddened gray, internally layered/banded fine (lighter gray) and medium (darker gray) basalts of 1.0-22.0 cm width. Smaller vesicles in finer bands, some hairline veins cutting banding. Unit F92. N 67.22000 2.93000 0949.90 95114 104 642 E 079 Rotary 02 000 0092 1-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-79R-1, Unit F92. N 67.22000 2.93000 0951.40 95140 104 642 E 079 Rotary 02 049 0035 All DU DARK RED BROWN, BASALTIC, VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Rather coarse, median diameter 0.5 mm. Spotted with dark shards of fresh glass. Unit S35. N 67.22000 2.93000 0951.40 95189 104 642 E 079 Rotary 02 051 0093 9-21. DU MEDIUM-GRAINED, SPARSELY PLAGIOCLASE PHYRIC TO APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Purplish gray top to vesicular flow top breccia. Plagioclase phenocrysts < 2.0 mm. Trace pyroxene phenocrysts <1.0 mm. Slightly vesicular center flow, vesicles filled with smectite. Dark gray basal breccia preserved. Unit F93. N 67.22000 2.93000 0951.40 95191 104 642 E 079 Rotary 03 000 0093 1-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-79R-2, Unit F93. N 67.22000 2.93000 0952.80 95279 104 642 E 080 Rotary 01 000 0093 1-4B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-79R-2, Unit F93. N 67.22000 2.93000 0959.30 95929 104 642 E 080 Rotary 01 076 0036 All DU DARK RED BROWN TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Clast median diameter of 0.02 mm, much unrecovered. Unit S36. N 67.22000 2.93000 0959.30 96005 104 642 E 080 Rotary 01 077 0094 5-18. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Base not recovered. Good flow top breccia down to 80R-2, 120 cm. Vesicular to moderately vesicular. Unit F94. N 67.22000 2.93000 0959.30 96006 104 642 E 080 Rotary 02 000 0094 1-18. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-80R-1, Unit F94. N 67.22000 2.93000 0960.80 96079 104 642 E 080 Rotary 03 000 0094 1-4B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-80R-1, Unit F94. N 67.22000 2.93000 0962.30 96229 104 642 E 080 Rotary 03 024 0094 A All DU FINE-GRAINED, APHYRIC TO SPARSELY PLAGIOCLASE-CLINOPYROXENE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Top and base not recovered. Vesicles and steeply inclined fractures filled by saponite. Unit F94A. N 67.22000 2.93000 0962.30 96253 104 642 E 081 Rotary 01 000 0094 A 1A-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-80R-3, Unit F94A. N 67.22000 2.93000 0968.30 96829 104 642 E 081 Rotary 02 000 0094 A 1-12. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-80R-3, Unit F94A. N 67.22000 2.93000 0969.80 96979 104 642 E 081 Rotary 02 125 0094 B 13-17. DU FINE-GRAINED, SPARSELY PLAGIOCLASE-CLINOPYROXENE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Top and base not recovered. Vesicular to sparsely vesicular, with locally complex zones of streaming and interconnecting veins. Dark green and light green celadonite(?) and smectite fillings, intra-unit breccia cemented by dark green smectite 82R-1, 24-50 cm. Some propagation of fractures from vesicles. Streaking (flow fabric) laminations toward lowest sections. Unit F94B. N 67.22000 2.93000 0969.80 97104 104 642 E 082 Rotary 01 000 0094 B 1-11. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-81R-2, Unit F94B. N 67.22000 2.93000 0977.80 97779 104 642 E 083 Rotary 01 000 0094 B 1-5. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-81R-2, Unit F94B. N 67.22000 2.93000 0987.30 98729 104 642 E 083 Rotary 01 016 0037 6. DU RED BROWN BASALTIC, VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Subhorizontal orientation of clasts, 90% nonvesicular shards, 10% lithics of underlying basalt. Sparse plagioclase, clinopyroxene crystals, quartz grains. Erosional contact with Unit F95 recovered. This is Unit S37. N 67.22000 2.93000 0987.30 98745 104 642 E 083 Rotary 01 018 0095 6-14. DU MEDIUM-GRAINED, SPARSELY PHYRIC, GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Purplish gray, strongly vertically veined and moderately vesicular. Plagioclase phenocrysts up to 2.0 mm in diameter, plus iddingsitized olivines < 0.5 mm. Unit F95. N 67.22000 2.93000 0987.30 98747 104 642 E 083 Rotary 01 082 0038 All DU DARK BROWN, LITHIC, VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Contains green patches and white feldspar(?) spotting. Arcuate and vesicular dark gray shards, few underlying basaltic lithic fragments, plagioclase crystals approximately 0.6 mm in diameter. Unit S38. N 67.22000 2.93000 0987.30 98811 104 642 E 083 Rotary 01 082 0096 15-25. DU FINE-GRAINED, SPARSELY PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Base not recovered. Moderately vesicular, purplish gray to gray brecciated basalt top, < 1% plagioclase and clinopyroxene, locally glomeroporphyritic. Central/lower sections nonvesicular and streaked (flow fabric) within well-developed random orientation zone. Unit F96. N 67.22000 2.93000 0987.30 98811 104 642 E 083 Rotary 02 000 0096 1-19. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-83R-1, Unit F96. N 67.22000 2.93000 0988.80 98879 104 642 E 084 Rotary 01 000 0096 1-27. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-83R-1, Unit F96. N 67.22000 2.93000 0996.80 99679 104 642 E 085 Rotary 01 000 0097 1A-1F. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Top and upper center flow not recovered. Recovery commences in chaotic laminar zone, abundantly xenolithic, cut by subvertical, en echelon, hairline fractures, and giving way to regular subhorizontal fabric. Disseminated copper blebs throughout groundmass and concentrated in vesicles. 2-5% xenolithic with highly vesicular, aphyric gray basalt. Highly vesicular base, up to 35% vesicles at contact, streaking (flow fabric) becomes more diffuse and mottled from 85R-5, 0 cm, downward. Unit F97. N 67.22000 2.93000 1006.30 100629 104 642 E 085 Rotary 02 000 0097 1A-1F. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-85R-1, Unit F97. N 67.22000 2.93000 1007.55 100754 104 642 E 085 Rotary 03 000 0097 1A-1D. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-85R-1, Unit F97. N 67.22000 2.93000 1008.95 100895 104 642 E 085 Rotary 04 000 0097 1A-1E. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-85R-1, Unit F97. N 67.22000 2.93000 1010.29 101028 104 642 E 085 Rotary 05 000 0097 1A-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-85R-1, Unit F97. N 67.22000 2.93000 1011.70 101170 104 642 E 085 Rotary 05 113 0039 8-11. DU DARK RED BROWN, WELL SORTED, VITRIC, LITHIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments 10-15% lapilli-sized basalt fragments, tachylitic, quenched and microcrystaline. Vitrics are vesicular angular or arcuate shards. Contact with Unit F97 recovered, with Unit F98 not recorved, quartz grains are present. Shards replaced by analcite. Unit S39. N 67.22000 2.93000 1011.70 101283 104 642 E 085 Rotary 06 000 0098 1-9. DU MEDIUM-GRAINED, MODERATELY PLAGIOCLASE PHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Vesicular to highly vesicular flow top, with coalesced vesicles and mixed green smectite-rich top. Smectite-rich alteration patches show weak subhorizontal alignment, especially between 86R-1, 90 and 105 cm. Toward base, vesicles are larger and elongate at shallow angle to horizontal. Glassy base with plagioclase microlites, slightly reddened near base. Unit F98. N 67.22000 2.93000 1013.03 101303 104 642 E 086 Rotary 01 000 0098 1A-1G. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-85R-6, Unit F98. N 67.22000 2.93000 1015.80 101579 104 642 E 086 Rotary 02 000 0098 1A-4B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-85R-6, Unit F98. N 67.22000 2.93000 1017.24 101723 104 642 E 086 Rotary 02 085 0040 5. DU DARK RED(TOP) TO GRAY BROWN(BASE), VITRIC, LITHIC, LAPILLI TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Normally graded. Fragments are highly vesicular and show a continuous range from vitric to microcrystalline. Monolithologic. Shards are zeolitized. Unit S40. N 67.22000 2.93000 1017.24 101808 104 642 E 086 Rotary 02 101 0099 6A-12. DU MIXED MEDIUM-GRAINED AND FINE-GRAINED, SPARSELY PHYRIC, DARK GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Very fine-grained within top 10 cm, with brown smectite-lined vesicles. Central section is alternately banded medium-fine-grained basalts up to 3 cm wide. 2% volume plagioclase phenocrysts < 3.0 mm diameter. Fine network breccia veining at 86R-3, 5-20 cUnit F99. N 67.22000 2.93000 1017.24 101824 104 642 E 086 Rotary 03 000 0099 1A-10. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-86R-3, Unit F99. N 67.22000 2.93000 1018.65 101865 104 642 E 086 Rotary 03 092 0099 A 11-18. DU MIXED MEDIUM-GRAINED AND FINE GRAINED, APHYRIC GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Quenched top with plagioclase microlites < 0.25 mm. Identical banding of basalt grain-size variations to those Unit F99, grading into wholy medium-grained in upper 50 cm. Unit F99A. N 67.22000 2.93000 1018.65 101957 104 642 E 086 Rotary 04 000 0099 A 1-7. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-86R-4, Unit F99A. N 67.22000 2.93000 1020.07 102007 104 642 E 087 Rotary 01 000 0100 1-7. DU MEDIUM-GRAINED, APHYRIC GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Glassy base with plagioclase microlites < 0.20 mm. Moderate vesicularity, increasing toward base. Locally glomeroporphyritic plagioclase. Local intra-unit brecciation in intensively vesicular zones 87R-1, 60-65 cm. Unit F100. N 67.22000 2.93000 1025.30 102530 104 642 E 087 Rotary 01 100 0041 9-10. DU DARK RED BROWN BASALTIC, LITHIC, VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Ash clasts (95 %) are arcuate vitric shards, some pumice(?). 5% lithic tuff fragments. Some feldspar crystals. Terrigenous clinopyroxene and quartz fragments. Unit S41. N 67.22000 2.93000 1025.30 102630 104 642 E 087 Rotary 01 108 0101 11-17. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Reddened vesicular and fragmented basalt with pocket infills of red brown tuff in upper section. Sparse vesicles filled with dark green smectite. Some weak streaking (flow fabric), discontinuous and closely spaced. Basal breccia 88R-1, 20-96 cm, without volcaniclastics. Unit F101. N 67.22000 2.93000 1025.30 102638 104 642 E 087 Rotary 02 000 0101 1-15B. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-87R-2, Unit F101. N 67.22000 2.93000 1026.80 102680 104 642 E 088 Rotary 01 000 0101 1-13. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-88R-1, Unit F101. N 67.22000 2.93000 1034.80 103480 104 642 E 088 Rotary 01 099 0102 14-20. DU FINE-GRAINED, APHYRIC, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Base not recovered. Purplish, moderately vesicular breccia flow top overlies subvertically streamed vesicular zone. Smectite filled vesicles with surrounding red oxidation and along hairline fractures. Unit F102. N 67.22000 2.93000 1034.80 103579 104 642 E 088 Rotary 02 000 0102 1-9. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-88R-1, Unit F102. N 67.22000 2.93000 1036.25 103625 104 642 E 089 Rotary 01 000 0103 1-8C. DU FINE-GRAINED, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments Aphyric to sparsely plagioclase phyric. Purplish gray flow top breccia, moderately vesicular, dark gray brown matrix without tuff. Zones of yellowish to orange red discoloration around vesicles and veins indicate hydrothermal(?) glomeroporphyritic clusters. Some filling of vesicles by smectite, but calcite and quartz common. A weak streaky (flow fabric) lamination develops toward the base of the unit. Vesicular base of flow. Unit F103. N 67.22000 2.93000 1044.30 104430 104 642 E 089 Rotary 02 000 0103 1-4. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-89R-2, Unit F103. N 67.22000 2.93000 1045.71 104570 104 642 E 090 Rotary 01 000 0103 A 1-16B. DU FINE-GRAINED, GRAY BASALT FLOW. see comments see comments see comments see comments see comments see comments see comments see comments As Unit 103. This is Unit F103A. N 67.22000 2.93000 1053.80 105380 104 642 E 090 Rotary 02 000 0103 A 1-8. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-90R-1, Unit F103A. N 67.22000 2.93000 1055.30 105530 104 642 E 090 Rotary 03 119 0104 9-10. DU FINE-GRAINED, MODERATELY PLAGIOCLASE-CLINOPYROXENE PHYRIC, GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Purplish gray breccia flow top, vesicular. Vesicles coated with blue green celadonite. Plagioclase is locally glomeroporphyritic. Some reddening along fractures and adjacent to vesicles. Unit F104. N 67.22000 2.93000 1056.70 105788 104 642 E 091 Rotary 01 000 0104 A 1-21. DU FINE-GRAINED, MODERATELY PLAGIOCLASE-CLINOPHYROXENE PHYRIC, GRAY BASALT. see comments see comments see comments see comments see comments see comments see comments see comments Vesicles coated with blue green celadonite. Plagioclase is locally glomeroporphyritic. Flow center moderately vesicular. Some reddening along fractures and adjacent to vesicles, intense below 91R-2, 137 cm. Base of recovery extensively stained. Unit F104A. N 67.22000 2.93000 1063.30 106330 104 642 E 091 Rotary 02 000 0104 A 1-20. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-91R-1, Unit F104A. N 67.22000 2.93000 1064.80 106480 104 642 E 091 Rotary 03 000 0104 A 1-3. DU CONTINUED. see comments see comments see comments see comments see comments see comments see comments see comments See description in 642E-91R-3, Unit F104A. N 67.22000 2.93000 1066.30 106630 104 642 E 091 Rotary 03 027 0042 3. DU LITHIC, VITRIC TUFF. see comments see comments see comments see comments see comments see comments see comments see comments Red brown or red clasts in green matrix, median grain size 0.4 mm, matrix unsupported, well sorted, comagmatic; (>70%) vesicular shards, some fresh, arcuate to scoriaceous lithics (<30%); vitric tuff, rounded, crystalline basalt. Unit S42. N 67.22000 2.93000 1066.30 106657