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Architecture and Facies of Confined Deep-water Clastics in the Grand Coyer Remnant, Grès d’Annot, France

By
Julian Clark
Julian Clark
1
Heriot-Watt University, Edinburgh,United Kingdom
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David Stanbrook
David Stanbrook
1
Heriot-Watt University, Edinburgh,United Kingdom
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Andy Gardiner
Andy Gardiner
1
Heriot-Watt University, Edinburgh,United Kingdom
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Published:
January 01, 2008

Abstract

The Grand Coyer area provides a well-exposed remnant of the Grès d’Annot deep-water sandstones, which were deposited in the southern Alpine foreland basin during the Eocene and Oligocene. The Grès d’Annot has been extensively studied by many researchers; it provides an important analog for the stratigraphic and depositional architecture of deep-water elastics deposited in confined and ponded basins (for a full summary of recent work, see Joseph and Lomas, 2004).

The Grès d’Annot is preserved in a series of largely synclinal outliers in the Alps of southeast France and parts of Italy. During deposition, sediment was delivered from the southeast, draining the Maures-Esterel and Corsica-Sardinia massifs. Linked depocen-ters and troughs developed on top of early Alpine thrust systems of the southern sub-Alpine chains.

The Grand Coyer basin remnant (Figure 1) is a significant set of outcrops that allow us to link the paleogeography from the more proximal Annot town remnant in the south to the downdip basin remnants in the north. The north face of Grand Coyer exposes an extensive outcrop of the Grès d’Annot with a variety of depositional facies and stratigraphic architectures (Figures 211). The lower part of the exposed section comprises amalgamated sheet sandstones and conglomerates, interpreted to have been deposited in a highly confined basin setting. These are overlain by a distinctive interval comprising shale-rich intervals and sandstone packages with erosive bases interpreted as channel fills (Figures 510). The shale-rich intervals are characterized by

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Contents

AAPG Studies in Geology

Atlas of Deep-Water Outcrops

Tor H. Nilsen
Tor H. Nilsen
Desceased
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Roger D. Shew
Roger D. Shew
University of North Carolina
Wilmington, North Carolina
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Gary S. Steffens
Gary S. Steffens
Shell International E&P
Houston, Texas
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Joseph R. J. Studlick
Joseph R. J. Studlick
Maersk Oil America Inc.
Houston, Texas
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American Association of Petroleum Geologists
Volume
56
ISBN electronic:
9781629810331
Publication date:
January 01, 2008

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