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A Deep-water Amalgamated Sheet System, Punta Barrosa Formation, Marina′s Cliff, chile

By
Andrea Fildani
Andrea Fildani
1
chevron, ETC, San Ramon, California, USA
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Michael R. Shultz
Michael R. Shultz
1
chevron, ETC, San Ramon, California, USA
2
Department of Geological and Environmental Sciences, Stanford University, Stanford, California, USA
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Stephan A. Graham
Stephan A. Graham
2
Department of Geological and Environmental Sciences, Stanford University, Stanford, California, USA
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Andrew Leier
Andrew Leier
3
Department of Geology, University of Arizona, Tucson, Arizona, USA
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Published:
January 01, 2008

Abstract

The outcrops of Marina’s Cliff are part of the Punta Barrosa Formation along the eastern margin of the Andean fold-thrust belt in southernmost chile (Figure 1). This formation was deposited during the first deep-water, coarse-grained clastic depositional stage that characterized the Late Cretaceous of the Magallanes retro-arc foreland basin. Deep-water deposition initiated with the Punta Barrosa Formation, continued with the Cerro Toro Formation, and concluded with the shoaling-upward Tres Pasos Formation. Because of its proximity to the Andean belt, the Punta Barrosa Formation is pervasively thrusted and folded. Nevertheless, outcrops of the Upper Punta Barrosa to the east of the fold-thrust belt are not as extensively affected by tectonism and display better lateral continuity and architecture. The ∼1000-m (∼3300-ft)-thick Punta Barrosa Formation consists of interbedded packets of sandstone and mudstone. The bedding attitude and depositional style is characterized by layered and sometimes amalgamated beds.

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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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