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Paleogene Slope Deposits; Examples from the Chaudiere, Pointe-a-Pierre and San Fernando Formations, Central Range, Trinidad

By
Hasley Vincent
Hasley Vincent
Department of Earth Sciences Dalhousie University Room 3006 Life Sciences Centre Halifax, Nova Scotia B3H 4J1, Canada
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Grant Wach
Grant Wach
Department of Earth Sciences Dalhousie University Room 3006 Life Sciences Centre Halifax, Nova Scotia B3H 4J1, Canada
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Published:
December 01, 2007

Abstract

Various interpretations have been proposed for depositional environments in the Trinidad-Eastern Venezuela area during the Paleogene, most without supporting sedimentological evidence. We describe lithofacies in the Chaudiere, Pointe-a-Pierre, and San Fernando formations, which suggest that sediment gravity flows were the primary delivery mechanism for the coarse-grained clastics and carbonates that characterize these formations. Outcrop examples of soft sediment deformation, block slides, and floating boulders attest to sediment instability along over-steepened gradients, consistent with a slope environment. Other common facies characteristics include low and high density turbidites and amalgamated channel fills, but there is no evidence for shallow-water reworking of sediments. The reinterpretation of a late Eocene outcrop highlights the need to resolve depositional processes along with biostratigraphy, as estimates of water depths based solely on paleontology may be underestimated. This has implications for Paleogene paleogeographic reconstructions.

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GCSSEPM

The Paleogene of the Gulf of Mexico and Caribbean Basins: Processes, Events and Petroleum Systems

Lorcan Kennan
Lorcan Kennan
Houston, Texas
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James Pindell
James Pindell
Houston, Texas
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Norman C. Rosen
Norman C. Rosen
Houston, Texas
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SEPM Society for Sedimentary Geology
Volume
27
ISBN electronic:
978-0-9836096-3-6
Publication date:
December 01, 2007

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