17166 23CC 0 0 250.00 253.10 MOB T 17 1 S RT VITRIC TUFF 2 S % ALTERED,DOMINATED BY LIGHT GLASS AND ALTERED 3 S % GLASS,THE LIGHT GLASS MAINLY SPLINTERY ANGULAR 4 S % SHARDS,COMMONLY FROTHY* 5 G PLAG 6 G % SOME GRAINS, LAMINATION SHOWN BY BOTH GRAIN SIZE 7 G % AND BY ALIGNMENT OF SOME ELONGATE GRAINS,MOST 8 G % GRAINS APPROX .05MM,ALMOST CERTAINLY PYROCLASTIC* 9 A CHLOROPH 10 A SERP 11 A % MANY GRAINS ALTERED TO TURBID GREEN OR BROWN 12 A % CHLOROPHAEITE AND SERPENTINE; 13 A ANALCIME CEMENT,VEINS 14 A % COMMON AS A PATCHY CEMENT,AS VEINLETS AND AS 15 A % IRREGULAR SPHERES IN THE CLAYEY(MONTMORILLONITE?) 16 A % INTERGRANULAR PARTS OF THE ROCK* 17 17166 25CC 0 0 270.00 271.60 MOB T 14 1 S RT VITRIC TUFF 2 S % ALTERED,FORAMINIFERAL* 3 G GLASS 4 G % MAINLY ANGULAR GRAINS OF DARK GLASS,LARGELY 5 G % ALTERED TO CHLOROPHAEITE AND RIMMED WITH A FILM 6 G % OF FIBROUS ZEOLITE,POSSIBLY REWORKED FROM A NEARBY 7 G % HYALOCLASTIC DEPOSIT,POSSIBLY PYROCLASTIC* 8 A CALCITE 9 A % SPHERES OF CALCITE(SOME SHOW "PSEUDOISOGYRES" AND 10 A % PERFORATED TESTS OF FORAMS FILLED WITH SPARRY 11 A % CALCITE)ABUNDANT,SOME PATCHY POIKILITIC CALCITE 12 A % BUT MAINLY A MATRIX OF GREEN CLAY,AVERAGE GRAIN 13 A % SIZE APPROX .1MM,FORAMS TO .2MM* 14 17166 29 11230 307.00 308.23 BASS I 17 1 S RT PLAG-OL-CPX MICROPHYRIC BASALT 2 S % SOURCE IS IR,SEE P.481,ALTERED; 3 S TEX MICROPHYRIC,SPHERULITIC TO VARIOLITIC* 4 P PLAG 5 P % MICROPHENOS,APPROX COMP AN64 TO AN75,MORE 6 P % ABUNDANT THAN IN OL; 7 P OL PSEUDOMORPHS 8 P % MICROPHENOS,COMPLETELY ALTERED; 9 P PYX 10 P % MICROPHENOS* 11 G GLASS 12 G % ALTERED TO YELLOW+ORANGE BROWN OR DEEP RED BROWN 13 G % MONT* 14 A MONT OL,GLASS 15 A % BOWLINGITE; 16 A FE.OX OL,GLASS 17 17166 29 11230 0 307.00 308.23 MOB I 23 1 S RT BASALT 2 S % ALTERED; 3 S TEX HYPOXTLLINE,SLIGHTLY VESICULAR,GLOMEROPHYRIC, 4 S VARIOLITIC 5 S % TEXTURE GIVEN IS ORIGINAL TEXTURE* 6 P PLAG TO .5X.75LATHS 7 P % APPROX COMP SODIC LABRADORITE,COMMONLY WITH PAINT 8 P % BRUSH ENDS(ALKALIC OVERGROWTHS?); 9 P OL TO .35 10 P % NOW ANTIGONITE AND IDDINGSITE; 11 P OP.MINS EQUANT 12 P AUGITE 13 G PLAG VARIOLITIC MICROLITES 14 G GLASS 15 G % NOW SHEAVES OF MONTMORILLONITE AND BROWN CHLORITE, 16 G % DUSTED WITH OPAQUES* 17 A MONT AMYGDULES GLASS 18 A CHLORITE AMYGDULES GLASS 19 V TO .5 MONT+CHLORITE+ 20 V HEMATITE 21 V % ID UNCERTAIN FOR HEMATITE(RED-BROWN MINERAL). 22 V % AMYGDULES* 23 17166 29 2 160 250 307.00 308.71 BASS I 18 1 S RT BASALT 2 S % SOURCE IS IR,SEE P.481; 3 S TEX CHILLED,MICROPHYRIC,GROUNDMASS GRADES FROM A 4 S GLASS SELVAGE THROUGH A SPHERULITIC LAYER (1CM 5 S THICK) TO FINE BOW-TIE OR SHEAF-LIKE VARIOLES TO 6 S RADIAL PLAGIOCLASE CLUSTERS SET IN A MASS OF FINE 7 S FEATHERY PYROXENE VARIOLES AND ALTERED INTERSTITIAL 8 S GLASS* 9 G PLAG 10 G PYX 11 G GLASS 12 G % ALTERED GLASS (MONT) PROBABLY IN PART PALAG PRIOR 13 G % DIAGENESIS* 14 A PALAG GLASS 15 A MONT GLASS,OL 16 A IDDINGS OL 17 V % ESSENTIALLY NON-VESICULAR* 18 17166 29 3 720 740 307.00 310.73 BASS I 14 1 S RT PLAG-PYX-OL MICROPHYRIC BASALT 2 S % SOURCE IS IR,SEE P.481; 3 S TEX CHILLED, MICROPHYRIC* 4 P PLAG 8.4 0.25X0.03 5 P PYX 2.8 0.13X0.10 6 P OL 2.3 0.19X0.12PSEUDOMORPHS 7 G OP.MINS 11.6 0.35EQUANT,ELONGATE 8 G PYX 74.8 FEATHERY VARIOLES 9 G % MODAL ANALYSIS* 10 A MONT CORES PLAG,OL 11 A % PLAG CORES,OL MICROPHENOS; 12 A IDDINGS OL 13 V 0 14 17166 29CC 307.00 311.60 BASS I 25 1 S RT COARSE-GRAINED BASALT OR FINE-GRAINED DIABASE 2 S % SOURCE IS IR,SEE PP.481-482; 3 S TEX APHYRIC,SUBVARIOLITIC GROUNDMASS,TEXTURALLY 4 S VARIABLE,WHERE RELATIVELY COARSE-GRAINED IS 5 S INTERGRANULAR OR RARELY SUBOPHITIC WHEREAS 6 S ELSEWHERE INTERGRANULAR TO INTERSERTAL VARIOLITIC 7 S MASS WITH ABUNDANT OPAQUE VEINS* 8 G PLAG 28.0 0.5X0.05 9 G PYX 20.2 0.12X0.12 10 G OL 2.7 0.5X0.12PSEUDOMORPHS 11 G OP.MINS 12.9 0.1X0.02 12 G GNDMASS 36.2 13 G % INCLUDES PYX+PLAG+OP.MINS IN AN ABUNDANT GREEN 14 G % INTERSERTAL MASS OF INTERSERTAL MASS OF MONT, 15 G % AT OTHER END ARE FEATHERY QUENCHED VARIOLES; 16 G AUGITE 17 G % QUENCHED PYROXENE IS MAINLY SUBCALCIC AUGITE, 18 G % MODAL ANALYSIS* 19 A MONT CORES PLAG 20 A CELAD CORES PLAG 21 A MONT PYX 22 A MONT OL 23 A CELAD OL 24 V 0.35 .1 MONT 25 17166 29CC 0 0 307.00 311.60 MOB I 34 1 S RT FINE DIABASE OR COARSE BASALT 2 S % ALTERED,THIS SECTION CONSISTS OF THREE BANDS-GRAY, 3 S % GREEN,BROWN* 4 G % THE FOLLOWING IS A DESCRIPTION OF THE GRAY BAND:. 5 G % THE GRAY BAND IS THE LEAST ALTERED AND HAS A 6 G % DOLERITIC TEXTURE,IS FINE DIABASE IN GRAIN SIZE(TO 7 G % 1MM) AND NON-VESICULAR; 8 G PLAG TO 1X.04LATHS 9 G % ALBITE AND PERICLINE TWINS,CORE COMMONLY 10 G % SERICTIZED? OR SAUSSURITIZED; 11 G PYX 12 G % INTERSTITIAL; 13 G OP.MINS EQUANT-BLADED EUHEDRAL 14 G % COMMONLY CLUSTERED; 15 G OL 16 G % ABUNDANT SERPENTINE PSEUDOMORPHS OF OL,THE 17 G % FOLLOWING IS A DESCRIPTION OF THE GREEN BAND:; 18 G BASALT 19 G % GENERALLY SAME AS GRAY BAND BUT VESICLES RIMMED 20 G % WITH VERY FINE GRAINED BASALT AND CHLORITIC 21 G % GROUNDMASS MORE COMMON,THE FOLLOWING DESCRIPTION 22 G % IS FOR THE BROWN BAND:; 23 G PLAG TO .5 24 G % FINE GRAINED,INTERSTITIAL PART BROWN,COMMONLY 25 G % RADIATING LIKE LARGE VARIOLITES; 26 G OP.MINS TO .4X.03BLADES 27 G % HEAVILY CHARGED WITH OPAQUES* 28 A CHLORITE VESICLES+ 29 A GROUNDMASS 30 A MONT VESICLES 31 A % THIS IS THE GREEN BAND* 32 V TO .7 CHLORITE+MONT IRREGULAR 33 V % SOME RIMMED WITH BASALT* 34