Significance of Paleontologic Results of Deep-Sea Drilling Project Legs 1-9.

Hay, William W. (1973) Significance of Paleontologic Results of Deep-Sea Drilling Project Legs 1-9. AAPG Bulletin, 57 (1). pp. 55-62. DOI 10.1306/819A4246-16C5-11D7-8645000102C1865D.

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The cores recovered by the Deep Sea Drilling Project provide a reservoir of material for paleontologic investigation, offering unparalleled opportunities to learn about the global aspects of biostratigraphy, paleobiogeography, paleoecology, paleoclimatology, paleoproductivity, changes in ocean-water chemistry, and diagenetic processes. At the time of inception of the Deep Sea Drilling Project, marine plankton fossil groups were poorly known except for the planktonic Foraminifera. In the past few years, the calcareous nannoplankton also have been used to establish zonations for Jurassic to Holocene strata, and a radiolarian zonation of the Cenozoic has been worked out. It is now feasible to evaluate differences in age-equivalent fossil assemblages in the different areas of the ocean, in different climatic zones, at different depths, and in different sediment types. Biogeographic differences, particularly between the southern ocean and the North Atlantic and North Pacific, have been detected. Distinct climatic zonation of the oceans became well established during the Late Cretaceous and has been subject to periodic intensification during the Cenozoic, with the end of the Cretaceous, end of the Eocene, and the Pliocene being times of especially rapid change and evolution. Accumulations of siliceous ooze indicate regions of high productivity. Dissolution of calcareous pelagic fossils is selective, removing some species from the assemblage before others are attacked; this phenomenon offers a method of determining fluctuations of the calcium carbonate compensat on depth, and a means of investigating diagenetic processes in deep-sea sediments.

Document Type: Article
Keywords: significance, Paleontologic Results, Deep-Sea Drilling Project, DSDP, Legs 1-9
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1306/819A4246-16C5-11D7-8645000102C1865D
ISSN: 0149-1423
Projects: Enrichment, DSDP
Date Deposited: 03 Mar 2017 13:15
Last Modified: 07 Feb 2018 08:27

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