Unknown
PANGAEA
In:
Supplement to: Pimm, Anthony C (1974): Sedimentology and History of the Northeastern Indian Ocean from Late Cretaceous to Recent. In: von der Borch, C.C.; Sclater, J.G.; et al., Initial Reports of the Deep Sea Drilling Project, Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, XXII, 717-803, https://doi.org/10.2973/dsdp.proc.22.139.1974
Publication Date:
2023-08-28
Description:
Eight sites were drilled on Leg 22 in the northeastern Indian Ocean. Three sites (214, 216, 217) on Ninetyeast Ridge penetrated a thick sequence of mostly Tertiary calcareous oozes passing down into shallow-water sediments with volcanogenic material in Sites 214 and 216. The age of the basal sequence increases northwards from Paleocene (214) through Maastrichtian (216) to Campanian (217). A nonmarine sequence of volcanoclastics and lignite overlies basalt at 214. Drilling terminated in a dolomite chert sequence at 217 before bsalt was encountered. Two sites (213, 215), in deep water on either side of Ninetyeast Ridge, showed calcareous ooze of Paleocene to early Eocene age overlying basalt passing up into brown clay and finally siliceous ooze of late Miocene and younger age. A major hiatus centered in the Oligocene occurs at both these sites. One site (212), drilled in the deepest part of the Wharton Basin, penetrated a brown clay sequence interbedded with several thick calcareous units, each of a very short time duration. Evidence from sedimentary structures and calcareous microfossils.
Keywords:
22-212; 22-213; 22-215; 22-216; 22-217; 22-217A; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Indian Ocean//BASIN; Indian Ocean//RIDGE; Leg22; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sample code/label; Sediment type; Size; Substrate type; Visual description
Type:
Dataset
Format:
text/tab-separated-values, 122 data points
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