29279A 12 1 3501500 194.00 194.35 195.50 OV 57 1 L BASALT (VESICULAR); 2 T THE UPPER 30 CM OF THE CORE IS SUBAPHANITIC TO VERY 3 T FINE GRAINED, AT THE BASE OF CORE 12 SECTION 1 THE 4 T BASALT IS FINE GRAINED; 5 S SECTIONS 12-1 + 13-1 + 13-2 HAVE PENETRATED THE 6 S UPPER 4.5 M OF A MASSIVE FLOW; 7 O DARK GREY (N3), SEE CORE FORM AND LITHOLOGIC 8 O DESCRIPTION IN THE INITIAL REPORTS FOR ADDITIONAL 9 O INFORMATION; 10 V % VESICULAR AND AMYGDALOIDAL BASALT, CORE 12 11 V % SECTION 1 CONSISTS OF VESICULAR BASALT WITH 1 12 V % PERCENT PLAG PHENOCRYSTS; 13 V 0.5 - 410-40 14 V % IN THE UPPER 30 CM OF 12-1 VESICLES COMPRISE UP TO 15 V % 40 PERCENT OF THE ROCK, THE VESICLES DECREASE 16 V % IN ABUNDANCE DOWN CORE SO THAT AT THE BOTTOM OF 17 V % CORE 12 SECTION 1 THEY COMPRISE LESS THAN 10 18 V % PERCENT OF THE VOLUME, VESICLES RANGE FROM 19 V % 0.5 TO 4 MM IN DIAMETER AVERAGING 1.5 MM; 20 V CALCITE, PYRITE 21 V ZEOLITE, CHLORITE 22 V % APPROXIMATELY 90 PERCENT OF THE VESICLES ARE 23 V % UNFILLED, 3 PERCENT ARE PARTIALLY OR ENTIRELY 24 V % FILLED WITH WHITE CALCITE, 4 PERCENT HAVE 0.5 MM 25 V % THICK LININGS OF QUESTIONABLE BLUE ZEOLITE AND 26 V % 3 PERCENT ARE FILLED WITH QUESTIONABLE CHLORITE, 27 V % RARE SUBHEDRAL PYRITE CRYSTALS OCCUR IN THE 28 V % VESICLES, IDENTITY UNCERTAIN FOR ZEOLITE AND 29 V % CHLORITE; 30 P PLAG 1 31 P % CORE 12 SECTION 1 CONSISTS OF VESICULAR BASALT 32 P % WITH 1 PERCENT PLAG PHENOCRYSTS; 33 P FELDSPAR < 1 TO 4.0 34 P % BASALT OF 12-1 CONSISTS OF LESS THAN OR EQUAL TO 35 P % 1 PERCENT OF WHITE FELDSPAR PHENOCRYSTS, RANGING 36 P % TO 4 MM IN LENGTH IN A FINE GRAINED GROUNDMASS; 37 G FELDSPAR 60 38 G % FELDSPAR LATHS (60 PERCENT) IN FINE GRAINED 39 G % GROUNDMASS; 40 G PYX 41 G % IDENTIFICATION UNCERTAIN IN FINE GRAINED 42 G % GROUNDMASS; 43 G OL 44 G % IDENTIFICATION UNCERTAIN IN FINE GRAINED 45 G % GROUNDMASS; 46 G GLASS 47 G % IDENTIFICATION UNCERTAIN IN FINE GRAINED 48 G % GROUNDMASS; 49 R CALCITE 50 R % IN VESICLES; 51 R PYRITE 52 R % IN VESICLES; 53 R ZEOLITE 54 R % IDENTIFICATION UNCERTAIN IN VESICLES; 55 R CHLORITE 56 R % IDENTIFICATION UNCERTAIN IN VESICLES; 57 29279A 13 1 7001500 199.00 199.70 200.50 OV 26 1 L BASALT; 2 T SECTIONS 13-1 AND 13-2 CONSIST OF FINE GRAINED 3 T BASALT WITH RARE VESICLES AND PHENOCRYSTS, CORE 13 4 T SECTION 1 CONSISTS OF THE SAME ROCK AS CORE 12 5 T SECTION 1 BUT WITH NO OR FEW PHENOCRYSTS AND 6 T VESICLES; 7 S SECTIONS 12-1 + 13-1 AND 13-2 HAVE PENETRATED THE 8 S UPPER 4.5 M OF A MASSIVE FLOW; 9 A % SEE CODE O (OTHER INFORMATION); 10 O SECTIONS 13-1 AND 13-2 CONSIST OF THE SAME ROCK AS 11 O CORE 12 SECTION 1 BUT WITH NO OR FEW PHENOCRYSTS 12 O OR VESICLES, THE BASALT IS ALMOST FRIABLE AND MANY 13 O OF THE CORE SEGMENTS HAVE BECOME BARREL SHAPED AS A 14 O RESULT OF THE CORING PROCESS - THIS MAY SUGGEST 15 O CONSIDERABLE GLASS IN THE GROUNDMASS OR A MODERATE 16 O TO ADVANCED DEGREE OF ALTERATION, CORE 13 SECTION 1 17 O CONSISTS OF 16 PIECES OF BASALT, ALTHOUGH THERE IS A 18 O A GAP - ENOUGH OF THE CORE WAS RECOVERED TO SHOW 19 O THAT THE ROCK OF THIS CORE GRADES LITHOLOGICALLY 20 O INTO THE ROCK OF CORE 12 SECION 1; 21 V % CORE 13 SECTION 1 CONSISTS OF THE SAME ROCK AS 22 V % CORE 12 SECTION 1 BUT WITH NO OR FEW PHENOCRYSTS 23 V % AND VESICLES; 24 G GLASS 25 G % POSSIBLY CONSIDERABLE GLASS IN THE GROUNDMASS; 26 29279A 13 2 01500 199.00 200.50 202.00 OV 23 1 L BASALT; 2 T NON-VESICULAR, NON-PORPHYRITIC, FINE GRAINED BASALT, 3 T SECTIONS 13-1 AND 13-2 CONSIST OF FINE GRAINED 4 T BASALT WITH RARE VESICLES AND PHENOCRYSTS; 5 S SECTIONS 12-1 + 13-1 + 13-2 HAVE PENETRATED THE 6 S UPPER 4.5 M OF A MASSIVE FLOW; 7 A % SEE CODE O (OTHER INFORMATION); 8 O CORE 13 SECTION 2 HAS BASALT WITH 20 PIECES 9 O COMPLETELY FILLING SECTION AND IS IDENTICAL 10 O LITHOLOGICALLY TO CORE 13 SECTION 1 AND THE 11 O NON-VESICULAR + NON-PORPHYRITIC ROCK OF THE 12 O BOTTOM OF CORE 12 SECTION 1, THE BASALT IS 13 O ALMOST FRIABLE AND MANY OF THE CORE SEGMENTS 14 O HAVE BECOME BARREL SHAPED AS A RESULT OF THE 15 O CORING PROCESS - THIS MAY SUGGEST CONSIDERABLE 16 O GLASS IN THE GROUNDMASS OR A MODERATE TO 17 O ADVANCED DEGREE OF ALTERATION; 18 V % CORE 13 SECTION 2 CONSISTS OF THE SAME ROCK AS 19 V % CORE 12 SECTION 1 BUT WITH NO OR FEW PHENOCRYSTS 20 V % AND VESICLES; 21 G GLASS 22 G % POSSIBLY CONSIDERABLE GLASS IN THE GROUNDMASS; 23