Deep-sea erosional unconformity in the southeastern Gulf of Mexico

Multichannel seismic data and Deep Sea Drilling Project (DSDP) well information reveal a prominent erosional unconformity in the deep southeastern Gulf of Mexico. Corresponding to a 44 to 38.5 m.y. B.P. hiatus (middle to late Eocene) at DSDP site 540 (Leg 77), the unconformity was apparently produce...

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Bibliographic Details
Published in:Geology (Boulder) 1983-04, Vol.11 (4), p.215-218
Main Authors: Angstadt, D M, Austin, J A, Buffler, R T
Format: Article
Language:English
Online Access:Get full text
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Summary:Multichannel seismic data and Deep Sea Drilling Project (DSDP) well information reveal a prominent erosional unconformity in the deep southeastern Gulf of Mexico. Corresponding to a 44 to 38.5 m.y. B.P. hiatus (middle to late Eocene) at DSDP site 540 (Leg 77), the unconformity was apparently produced by the bottom effects of wind-driven surface currents (paleo-Florida Current) and gravitational mass movements capable of scouring the slope. Intensification of these sedimentary processes may have been related to global cooling and a reported drop in sea level in the late Eocene, but it may also have been part of a complex global response to a postulated Paleogene meteorite impact.
ISSN:0091-7613
DOI:10.1130/0091-7613(1983)112.0.CO;2