Table
T5. Summary of Hole 1136A volcaniclastic components.
Lithologic
Unit
Core
interval
Depth
(mbsf)Thickness
(m)
Age
Lithologies
with volcanic components
Volcanic
componentsAuthigenic
and secondary minerals
III
9R-1,
0 cm, to 9R-CC, 5 cm
70.30-79.90
9.60
early
Santonian to Cenomanian
Very
light brown foraminifer-bearing calcareous ooze
<5%
silt-sized palagonitized basaltic glass shards
Trace
of Fe smectite clay minerals (nontronite?)
IV
10R-1,
0 cm, to 10R-1, 100 cm
79.90-89.50
9.60
Cenomanian
to early Albian
Brown
zeolitic calcareous volcanic clayey sand
10-15%
silt to fine sand-sized palagonitized basaltic glass shards
Zeolites
(clinoptilolite, heulandite), Fe smectite (nontronite), glauconite
V
11R-1,
0 cm, to 15R-1, 5 cm
89.50-133.00
43.50
early
Albian
Dark
greenish gray carbonate-bearing zeolitic silty clay
<5%
silt-sized palagonitized basaltic glass shards
Zeolites
(clinoptilolite, heulandite), Fe smectite (nontronite), glauconite