Table
T3. Results of point counts on volcanic rock thin sections, Hole 1189A.
Core,
section,
interval (cm)Unit
Rock
type
Number
of pointsGroundmass
(%)
Vesicles
(%)Phenocrysts
(%)
Plagioclase
Clinopyroxene
Opaques
193-1189A-
1R-1
(Piece 1, 0-4)
1
Aphyric
dacite
750
80.4
19.6
0.0
0.0
0.0
3R-1
(Piece 2, 6-10)
5
Aphyric
dacite
750
85.4
14.5
0.0
0.0
0.0
7R-1
(Piece 5, 27-31)
10
Volcanic
rock
750
83.4
16.5
0.0
0.0
0.0
7R-1
(Piece 13, 83-86)
12
Volcanic
rock
750
96.0
4.0
0.0
0.0
0.0
8R-1
(Piece 6, 42-44)
15
Volcanic
rock
500
99.0
0.0
1.0
0.0
0.0
8R-1
(Piece 14, 90-92)
15
Volcanic
rock
500
98.2
0.8
1.0
0.0
0.0
Note: Point counts were measured using a rectangular grid with a = 0.667 mm and b = 0.8 mm.