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Core data from the Ocean Drilling Program legs 101-129
leg : 107 section: 02 unit/subunit : 0001
hole: 0650A top int: 60 cm observer code: DU
core: 066X pieces : All
rock name: FRAGMENTED ALTERED VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
Fragmented altered vesicular basalt, close to the contact with the
sediment. The basalt is made of highly altered, brownish glass. A few
skeletal Ca-plagioclase crystals are scattered in the groundmass. Relict
euhedral olivine pseudomorphs can be recognized. No pyroxenes can be
recognized. Vesicles range up to 2-3 mm in diameter. Crystallinity
increases downward. Intersertal to intergranular texture. Pale green
dolomite-rich mud intercalated in the dolerite is observed in interval
650A-66X-2, 105-110cm.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
seee comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 02 unit/subunit : 0002
hole: 0650A top int: 75 cm observer code: DU
core: 066X pieces : All
rock name: CONTINUED.
contact : see comments
***** MAIN COMMENTS *****
Same as in Unit 1.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 02 unit/subunit : 0003
hole: 0650A top int: 105 cm observer code: DU
core: 066X pieces : All
rock name: VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
Dark gray vesicular basalt. Ca-plagioclase laths (grain size larger than in
section above) in altered matrix. Texture is intersertal to intergranular.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 02 unit/subunit : 0004
hole: 0650A top int: 130 cm observer code: DU
core: 066X pieces : All
rock name: N/A
contact : see comments
***** MAIN COMMENTS *****
Top of unit 4 probably an altered chilled glass margin marking the top of a
flow. Euhedral olivine and skeletal plagioclase crystals in altered glass.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 03 unit/subunit : 0004
hole: 0650A top int: 0 cm observer code: DU
core: 066X pieces : All
rock name: N/A
contact : see comments
***** MAIN COMMENTS *****
See description Unit 4 in 650A-66X-02.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: CC unit/subunit : 0005
hole: 0650A top int: 0 cm observer code: CMS
core: 066X pieces : All
rock name: FRAGMENTED ALTERED VESICULAR BASALT
contact : see comments
***** MAIN COMMENTS *****
Intersertal to intergranular texture. Laths of plagioclase in altered
groundmass. Rare clinopyroxene crystals are present. Pseudomorphs after
olivine.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 01 unit/subunit : 0006
hole: 0650A top int: 0 cm observer code: DU
core: 067X pieces : All
rock name: BASALT.
contact : see comments
***** MAIN COMMENTS *****
Finely crushed during drilling and mixed with drilling mud.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 01 unit/subunit : 0007
hole: 0650A top int: 30 cm observer code: DU
core: 067X pieces : All
rock name: VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
Intergranular texture. Ca-plagioclase (labradorite) laths in altered
matrix. Olivine pseudomorphs are present in the interval 650A-67X-1, 30-60
cm. Interval 650A-67X-1, 70-95 cm is altered vesicular basalt. Large (up to
2-3 mm diameter) vesicles are partially filled with carbonates, zeolites
and Fe-hydroxides. Texturally similar to other units. Yellowish band of
baked sediment(?) observed in interval 650A-67X-1, 98-102 cm.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 02 unit/subunit : 0008
hole: 0650A top int: 0 cm observer code: DU
core: 067X pieces : All
rock name: VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
Intersertal texture. Highly altered. Plagioclase laths are the only
recognizable primary phase. Vesicles > 10%. Interval 650A-67X-2, 0-30 cm,
contains fragmented pebbles embedded in drilling mud. Interval 650A-67X-2,
30-70 cm, is basalt with vesicles partially filled with by carbonates and
zeolites. Intersertal texture, with plagioclase laths dispersed in a highly
altered matrix.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: CC unit/subunit : 0009
hole: 0650A top int: 0 cm observer code: DU
core: 067X pieces : All
rock name: VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
See the description of 650A-68X-1.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 01 unit/subunit : 0009
hole: 0650A top int: 0 cm observer code: DU
core: 068X pieces : All
rock name: VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
Intersertal to intergranular texture. Olivine pseudomorphs not observed.
Ca-plagioclase laths are in a highly altered groundmass. A few clusters of
microphenocrysts of Ca-plagioclase observed.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 02 unit/subunit : 0009
hole: 0650A top int: 0 cm observer code: DU
core: 068X pieces : All
rock name: VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
See description of 650A-68X-1, unit 9.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: CC unit/subunit : 0009
hole: 0650A top int: 0 cm observer code: DU
core: 068X pieces : All
rock name: VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
See description of 650A-68X-1, Unit 9.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: 01 unit/subunit : 0010
hole: 0650A top int: 0 cm observer code: DU
core: 069X pieces : All
rock name: CRUSHED PEBBLES MIXED WITH DRILLING MUD.
contact : see comments
***** MAIN COMMENTS *****
Unit 10 is composed of crushed pebbles mixed with drilling mud. Fragments
of indurated sediments were observed at the base of this unit. Interval
650A-69X-CC, 0-7 cm.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
leg : 107 section: CC unit/subunit : 0011
hole: 0650A top int: 0 cm observer code: DU
core: 069X pieces : All
rock name: NON-VESICULAR BASALT.
contact : see comments
***** MAIN COMMENTS *****
This unit is composed of less altered, relatively non-vesicular basalt.
Intersertal texture. Ca-plagioclase laths in a matrix of clay plus
secondary Fe-hydroxide. Pseudomorphs after euhedral olivine also present.
***** PHENOCRYSTS *****
see comments
***** GROUNDMASS *****
see comments
***** COLOR *****
see comments
***** VESICLES *****
see comments
***** STRUCTURE *****
see comments
***** ALTERATION *****
see comments
***** VEINS/FRACTURES *****
see comments
introduction | data types | geographic areas | legs/sites/holes | sites/holes
These Web pages are from the Core Data from the Ocean Drilling Program Legs 101-129 CD-ROM produced in 2001 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center, and collocated World Data Center for Marine Geology and Geophysics, Boulder. Data were compiled in cooperation with the U.S. Science Support Program, the Joint Oceanographic Institutions, Inc., and the U.S. National Science Foundation. Please see the NGDC privacy, disclaimer, and copyright notices. Additional ocean drilling data are available from NGDC and from the ODP/IODP.
questions to: carla.j.moore@noaa.gov