Table T29. Summary of modal analyses of basalt, Holes 1256C and 1256D.
Core, section, interval (cm)
Original mode of phenocrysts (excluding vesicles)
Groundmass (including vesicles)
Olivine phenocryst size (mm)
ol
pl
cpx
sp
mt
Total
gl
meso.
vesicles
Gm min.
pl
cpx (aug)
pig
mt
qtz
Min
Max
Average
206-1256C-

















5R-1, 4-6 0.90 2.00 2.90








0.10 0.20 0.15
5R-2, 2-6 1.05 4.90 0.65 6.60








0.10 0.40 0.25
5R-2, 39-42 1.80 4.65 0.60 7.05








0.08 0.50 0.29
6R-1, 21-24 0.85 0.70 0.05 1.60








0.04 0.30 0.17
6R-1, 127-130 1.30 0.60 0.40 2.30








0.05 0.15 0.10
6R-2, 61-65 1.06 0.61 Tr 1.67








0.05 0.40 0.23
6R-3, 21-24 2.05 1.25 3.30








0.08 0.40 0.24
6R-4, 56-60 1.80 0.45 0.10 2.36

0.25 97.40




0.06 0.50 0.15
6R-5, 18-22 1.50 0.90 2.40








0.10 0.40 0.25
6R-5, 76-80 2.05 0.35 Tr 2.40








0.06 0.30 0.18
7R-1, 62-66 0.35 0.60 0.10 1.05
98.95 Tr





0.06 0.30 0.10
7R-1, 93-97 0.65 0.35 0.05 1.05








0.06 1.00 0.53
7R-3, 40-43 0.70 1.55 0.40 0.10 2.76 0.05
0.25 96.95




0.20 0.20 0.20
7R-4, 14-18 0.30 0.15 0.10 Tr 0.55








0.04 0.30 0.17

Core, section, interval (cm)
Plagioclase phenocryst size (mm)
Clinopyroxene phenocryst size (mm)
Montmorillonite/spinel phenocryst size (mm)
Min
Max
Average
Min
Max
Average
Min
Max
Average
206-1256C-









5R-1, 4-6 0.10 0.20 0.15



0.020 0.100 0.060
5R-2, 2-6 0.10 0.30 0.20 0.10 0.40 0.25
0.010 0.020 0.015
5R-2, 39-42 0.05 0.20 0.13 0.10 0.20 0.15
0.020 0.020 0.020
6R-1, 21-24 0.05 0.80 0.43 0.06 0.30 0.18
0.020 0.080 0.100
6R-1, 127-130 0.20 0.40 0.30 0.20 0.40 0.30
0.010 0.020 0.100
6R-2, 61-65 0.10 1.00 0.55 0.03 0.10 0.07
0.010 0.030 0.100
6R-3, 21-24 0.08 0.70 0.39






6R-4, 56-60 0.15 1.30 0.30 0.15 0.50 0.20



6R-5, 18-22 0.10 0.80 0.45



0.010 0.010 0.010
6R-5, 76-80 0.15 0.80 0.48



0.005 0.010 0.008
7R-1, 62-66 0.05 0.90 0.25 0.07 0.50 0.10



7R-1, 93-97 0.20 0.20 0.20 0.10 0.40 0.25
0.001 0.005 0.002
7R-3, 40-43 0.06 1.00 0.53 0.10 0.40 0.25
0.001 0.005 0.002
7R-4, 14-18 0.06 0.90 0.48 0.02 0.05 0.04
0.005 0.010 0.008

Notes: ol = olivine, pl = plagioclase, cpx = clinopyroxene, sp = spinel, mt = montmorillonite, pig = pigeonite, qtz = quartz, gl = glass. meso. = mesostasis, Gm min. = groundmass minerals, cpx (aug) = augite. Tr = present, but none was counted. — = absent. Only a portion of this table appears here. The complete table is available in ASCII.