Table
T3. Results of point counts on volcanic rock thin sections, Site 1190.
Core,
section,
interval (cm)Unit
Rock
type
Number
of points
Groundmass
(%)Vesicles
(%)Phenocrysts
(%)
193-1190A-
1R-1
(Piece 1, 0-2)
1
Dacite
500
85.6
11.4
2.2
0.6
0.2
193-1190B-
2R-1
(Piece 7, 40-43)
1
Dacite
750
90.4
7.2
1.8
0.5
Tr
193-1190C-
2R-1
(Piece 1, 3-5)
1
Dacite
750
88.2
9.7
1.4
0.2
0.2
3R-1
(Piece 3, 7-9)
1
Dacite
750
84.0
14.4
1.3
0.1
0.1
Notes: Tr = trace. Point counts were measured using a rectangular grid with a = 0.667 mm and b = 0.8 mm.