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Facies Architecture of Channel-levee Deposits, Lago Nordenskjold and Laguna Mellizas Sur, Cerro Toro Formation, chile

By
Mark D. Barton
Mark D. Barton
Shell Exploration and Production, Houston, Texas, USA
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Peter Craig
Peter Craig
Shell Exploration and Production, Houston, Texas, USA
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Brad E. Prather
Brad E. Prather
Shell Exploration and Production, Houston, Texas, USA
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Jonathan Copus
Jonathan Copus
Shell Exploration and Production, Houston, Texas, USA
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Published:
January 01, 2008

Abstract

Exposures of the Cretaceous Cerro Toro Formation, southern chile, provide an opportunity to compare and contrast the facies architecture of outer-and inner-levee deposits associated with a deep-water, slope channel system (Figure 1A). In the study area, located just to the east of Lago Pehoe (Figure 1B), a series of conglomerate-filled, southeast-trending channel systems have been mapped (Beaubouef, 2004). The best exposed of these, referred to as channel-complex set 3, is up to 5 km (3 mi) wide and 200 m (650 ft) thick. Internally, set 3 is composed of channel complexes that aggrade and shift laterally to the south. The focus of this study is on deposits that flank channel-complex set 3 to the east. Two outcrop panels are discussed. The first, referred to as Lago Nordenskjold, is located about 1 km (0.6 mi) from the margin of channel-complex set 3; it was interpreted as an outer levee (Devries and Lindholm, 1994; Beaubouef, 2004). The second, referred to as Laguna Mellizas Sur, is located at the margin of channel-complex set 3 and interpreted in this paper as an inner levee.

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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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