Table T11. Pyroclastic ash-fall deposits identified at Site 1138.

Lithologicunit/subunit Core, section,
interval (cm)		 Depth (mbsf) Age
(Ma)		 Age
type		 Color Volcanic components Composition
I 12R-3, 5-7 105.35
6.4-5.6
D+F+N Dark gray Brown glass, minor clinopyroxene Mafic
IIA 13R-1, 22-24 112.22
6.4-5.6
D+F+N Dark brownish gray Brown glass, felsic glass and feldspar Bimodal
IIA 13R-5, 17-19 118.17
6.4-5.6
D+F+N Pale brown Brown glass and clay-sized matrix material Mafic
IIB 15R-1, 73-75 131.93
10.0-8.9
D+F+N Dark gray Translucent pumice fragments Felsic
IIIA 19R-1, 110-112 170.80
12.2-11.7
D+F+N Light gray Blocky translucent glass shards Felsic
IIIA 30R-2, 34-35 277.34
27.0-26.5
F+N Light gray Translucent glass shards Felsic
IIIA 30R-2, 40-42 277.40
27.0-26.5
F+N Gray Translucent glass shards Felsic
IIIA 32R-1, 73-75 295.43
27.0-26.5
F+N Light gray Brown glass, minor clinopyroxene Mafic
IIIA 33R-1, 26-28 304.66
27.0-26.5
F+N Pale green Brown glass and lithic fragments Mafic
IIIA 36R-6, 41-43 340.41
34.3-33.5
F+N Green Brown glass ± glauconite Mafic

Note: D = diatoms, F = foraminifer, N = nannofossils.