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Book Chapter

Early Cretaceous Carbonate Platforms of the Northeastern North American Margin

By
L. F. Jansa
L. F. Jansa
Atlantic Geoscience Centre Dartmouth, Nova Scotia, Canada
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Published:
January 01, 1993

Abstract

Name: Northeastern North American continental margin carbonate shelf

Author: L. F. Jansa

Location: From 42° 30' to 46° north latitude and 57° to 68° west longitude, shelf off eastern Canada and northeastern United States

Geologic time interval: Tithonian–Aptian

Tectonic-sedimentary setting: Outer shelf; tectonically, eustatically, and climatically controlled, localized continuation of Jurassic carbonate megaplatform deposition

Basin type: Pericratonic (extensional), developed at the continental margin edge

Paleoclimate: Generally humid, subtropical

Platform type: Complex; intraplatform variety of environmental settings from shelf lagoon to an open shelf and/or rimmed shelf with steep escarpment in front

Platform geometry: Early Cretaceous segment of platform is a series of discontinuous carbonate platforms and banks up to 472 m thick and 50 km wide. It constitutes an integral part of a 1100-km-long carbonate platform belt representing the northern segment of a 6000-km-long or more Mesozoic carbonate megaplatform

Facies and fossils: Predominantly mudstone to skeletal wackestone, minor oolitic and skeletal grainstone, rare sponge bioherms; occasionally intercalated shale and terrigenous siltstone; pelagic and benthic foraminifers, molluscs, corals, sponges, and calpionellids

Systems tracts: Not established

Stacking pattern: Sigmoid; complex, sigmoid oblique; aggradational as well as retrogradational; different patterns synchronously developed at different places on the same platform

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Figures & Tables

Contents

AAPG Memoir

Cretaceous Carbonate Platforms

J. A. Toni Simo
J. A. Toni Simo
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Robert W. Scott
Robert W. Scott
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Jean-Pierre Masse
Jean-Pierre Masse
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American Association of Petroleum Geologists
Volume
56
ISBN electronic:
9781629810973
Publication date:
January 01, 1993

GeoRef

References

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