Table T2. Lithostratigraphic units and subunits, Site 1261.
Unit/
subunit
Hole, core, section,
interval (cm)
Depth
(mbsf)
Thickness
(mbsf)
Age
Lithology

207-



IA 1261A-1R-1, 0, through 4R-1, 0 0.00–69.70 69.70 Pleistocene–middle Pliocene Nannofossil ooze

* —


IB 1261A-4R-1, 0, through 14R-5, 15 69.70–310.55 240.85 middle Pliocene–late Miocene Nannofossil clay

* —


IC 1261A-14R-5, 15, through 20R-5, 117 310.55–369.27 58.72 late Miocene Clayey nannofossil ooze

* —


II 1261A-20R-5, 117 to 33R-4, 128 369.27–491.70 122.43 Eocene Calcareous chalk with clay

* —


IIIA 1261A-33R-4, 128, through 39R-1, 0 491.70–544.60 52.90 Paleocene Nannofossil chalk with clay

1261B-2R-1, 0, through 2R-3, 83 <530.00–533.83 >3.83

IIIB 1261A-39R-1, 0, through 41R-1, 33 544.60–564.13 19.53 Maastrichtian–Campanian Clayey nannofossil chalk

1261B-2R-3, 83, through 5R-4, 109 533.83–563.30 29.47

IV 1261A-41R-1, 33, through 50R-3, 32 564.13–653.52 89.39 Santonian–late Cenomanian Calcareous claystone with organic matter; nannofossil chalk with organic matter

1261B-5R-4, 109, through 14R-4, 51 563.30–650.21 86.91
V 1261A-50R-3-32, through 51R-2, 114 653.52–662.26 8.74 Cenomanian–Albian Quartz sandstone

1261B-14R-4, 51, through 16R-1, 148 650.21–665.98 15.77

Note: * = not recovered from Hole 1261B. — = not assigned.