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Science 28 May 1976:
Vol. 192. no. 4242, pp. 887 - 890
DOI: 10.1126/science.192.4242.887
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Articles

Controls on the Preservation of Biogenic Opal in Sediments of the Eastern Tropical Pacific

THOMAS C. JOHNSON 1

1 Department of Geology and Geophysics, University of Minnesota, Minneapolis 55455

A map of the preservation pattern of siliceous microfossils was constructed from an examination of 125 piston and gravity cores of Quaternary sediments from throughout the eastern tropical Pacific. Preservation is enhanced where high surface water productivity supplies a high input rate of siliceous tests to the sea floor, except in a large area north of 5°N, east of the East Pacific Rise. Here a high input rate of terrigenous silicates may adversely affect preservation of biogenic opal in the sea-floor sediments.

Submitted on December 11, 1975
Revised on February 6, 1976


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Joergensenium rotatile n. gen., n. sp. (Entactinaria, Radiolaria): its distribution in west Norwegian fjords.
K. R. Bjorklund, K. R. Bjorklund, P. Dumitrica, J. K. Dolven, and N. R. Swanberg (2007)
Micropaleontology 53, 457-468
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Science. ISSN 0036-8075 (print), 1095-9203 (online)