Data Report: Backscattered electron imagery analysis of early Pliocene laminated Ethmodiscus ooze, Site 1010

Pike, Jennifer ORCID: https://orcid.org/0000-0001-9415-6003 2000. Data Report: Backscattered electron imagery analysis of early Pliocene laminated Ethmodiscus ooze, Site 1010. Proceedings of the Ocean Drilling Program Scientific Results 167 , pp. 207-212. 10.2973/odp.proc.sr.167.233.2000

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Abstract

Giant diatoms from the genus Ethmodiscus Castracane are a ubiquitous but relatively rare component of the warm-surface ocean plankton. Ethmodiscus oozes have been documented as occurring during the geological past; however, the debate over the mechanism of formation of these oozes is still unresolved. This report documents the nature and occurrence of early Pliocene Ethmodiscus ooze from Ocean Drilling Program Site 1010. The sediment fabric of the ooze interval has been analyzed using scanning electron microscopy, specifically backscattered electron imagery. This has shown that the sediment consists of an irregular alternation between laminae rich in Ethmodiscus fragments; mixed-sediment laminae comprising silt grains, clays, and nannofossils; and horizontal to subhorizontal burrows filled with nannofossil clay that is similar to sediment deposited above and below the diatom-rich interval. The short stratigraphic occurrence of Ethmodiscus ooze at Site 1010 precludes any substantial contribution to the debate over the mechanism of formation of these deep-sea oozes; it is suggested, however, that further studies should consider the concentration (and subsequent deposition) of these giant diatoms along convergent oceanic frontal zones.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Earth and Environmental Sciences
Subjects:	G Geography. Anthropology. Recreation > GC Oceanography Q Science > QE Geology
Publisher:	Ocean Drilling Program
ISBN:	0884-5891
ISSN:	1096-7451
Last Modified:	18 Oct 2022 12:27
URI:	https://orca.cardiff.ac.uk/id/eprint/9847

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