Table T3. Summary of lithologic units at Site 1138.

Lithologic unit/subunit Basement
unit		 Core interval Depth
(mbsf)		 Thickness
(m)		 Age Lithology Interpretation
I   1R-1, 0 cm, to 12R-CC, 28 cm 0.00-112.00 112.00 late Pleistocene to late Miocene Gray foraminifer-bearing diatom clay and ooze with scattered ice-rafted pebbles Continuous pelagic with intermittent sediment gravity flows of terrigenous sediment; bathyal
IIA   13R-1, 0 cm, to 16R-CC, 18 cm 112.00-150.50 38.50 late Miocene Light gray foraminifer-bearing nannofossil clay Continuous pelagic with intermittent sediment gravity flows of terrigenous sediment; bathyal
IIB   17R-1, 0 cm, to 28R-CC, 10 cm 150.50-265.90 115.40 late to early Miocene White foraminifer-bearing nannofossil ooze Pelagically deposited sediment; bathyal environment
IIIA   29R-1, 0 cm, to 52R-CC, 26 cm 265.90-496.40 230.50 late Oligocene to late Maastrichtian White foraminifer-bearing nannofossil chalk Pelagically deposited sediment; bathyal environment
IIIB   53R-1, 0 cm, to 63R-CC, 18 cm 496.40-601.80 105.40 late Maastrichtian to middle Campanian White foraminifer-bearing chalk Pelagically deposited sediment; bathyal environment
IV   64R-1, 0 cm, to 69R-5, 112 cm 601.80-656.69 54.89 mid-Campanian to Turonian Interbedded light gray chalk and dark gray nannofossil claystone; black, organic-rich claystone Pelagically deposited sediment; bathyal environment
V   69R-5, 112 cm, to 71R-2, 138 cm 656.69-671.88 15.19 Santonian-Turonian Reddish brown glauconite-bearing calcareous sandstone and glauconitic sandy claystone Neritic (shallow marine) deposit
VI   71R-2, 138 cm, to 74R-1, 13 cm 671.88-698.23 26.35 Late Cretaceous Dark brown silty clay with interbedded sandstone and conglomerate Fluvial and possibly neritic (shallow marine)
VII 1-22 74R-1, 13 cm, to 89R-3, 73 cm 698.23-842.70 144.47 Cretaceous(?) Basalt flows capped by volcaniclastic rocks and minor sediments Volcanic lava flows and pyroclastics