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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 52 (1968)

Issue: 11. (November)

First Page: 2231

Last Page: 2241

Title: Foraminiferal Assemblages as Indicators of High Organic Carbon Content in Sediments and of Polluted Waters

Author(s): George A. Seiglie (2)

Abstract:

Assemblages related to high organic carbon content in sediments are related taxonomically to assemblages in sewage outfall areas, where sediments generally have a high percentage of organic matter. At least some species of the genera Buliminella, Bulimina, Fursenkoina, Florilus, Nonionella, and probably Uvigerina are found to be related to high organic carbon content in sediments. All these genera except the rotaliform Florilus and Nonionella have a toothplate.

Foraminifers related to sewage outfall areas from waters off the coast of Southern California and from the eastern Caribbean Sea are compared. Florilus grateloupii and Fursenkoina pontoni are dominant in sewage outfall areas of the eastern Caribbean Sea.

Fossil foraminiferal assemblages found by Batjes in oil-producing Miocene formations from Trinidad are similar to living assemblages in sediment with high organic carbon content. Some of these assemblages under certain conditions might be diagnostic of source rock for oil through its relation to the organic carbon in sediments, and they may be appropriate for the study of the development of oil basins.

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