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Paleoenvironmental significance of Late Cretaceous foraminifers from ODP site 1138 samples, A dredge and eltanin core E54-7,Kerguelen Plateau, Indian Ocean

Citation

Quilty, PG, Paleoenvironmental significance of Late Cretaceous foraminifers from ODP site 1138 samples, A dredge and eltanin core E54-7,Kerguelen Plateau, Indian Ocean, Proceedings of the Ocean Drilling Program, Scientific Results, 183 pp. 1-28. ISSN 0884-5891 (2002) [Refereed Article]


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Copyright Statement

Copyright 2002 National Science Foundation, and the Joint Oceanographic Institutions, Inc.

DOI: doi:10.2973/odp.proc.sr.183.003.2002

Abstract

Late Campanian and Maastrichtian benthic foraminifers are recorded from 12 samples from Ocean Drilling Program (ODP) Leg 183, Cores 183-1138A-52R through 63R (487.3-602.4 meters below seafloor), Kerguelen Plateau, Indian Ocean, and Danian benthics from one sample in the same section. The entire late Maastrichtian foraminifer fauna is noted from a dredge sample 220 km to the north. The structure of the fauna is compared with the Cenomanian-Turonian of the nearby Eltanin core E54-7. Faunas are reviewed in terms of planktonic percentage, composition, epifaunal/infaunal ratios, and dominance/diversity indices. The region was in the cool Austral Faunal Province through the Campanian-Maastrichtian and was probably warmer in the Cenomanian-Turonian. The ODP section is now 1600 meters below sea level and has subsided several hundred meters since deposition. Its fauna is dominated by epifaunal species suggesting little influence of upwelling. The dredge location has subsided little. Its fauna has a high infaunal content consistent with significant influence of upwelling near the plateau edge. The dominant benthic species remain constant through the ODP Cretaceous section, but subdominance changes, and the section is divided into three informal zones based on dominance/subdominance characteristics of the benthic fauna.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Quilty, PG (Dr Pat Quilty)
ID Code:57039
Year Published:2002
Deposited By:Earth Sciences
Deposited On:2009-06-13
Last Modified:2012-08-03
Downloads:1 View Download Statistics

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