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Tres Pasos Formation: Outcrops Overview

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Published:
January 01, 2009

Abstract

Five Tres Pasos Formation outcrops, presented along depositional dip, are featured in this fieldguide. The outcrop belt is traced in orange on the satellite image at left. The Tres Pasos Formation is highlighted on the stratigraphic column at the lower left; it consists of continental margin-scale slope deposits that represent the filling phase of the Magallanes foreland basin. An architecturally variable suite of sandstone-rich channel and sheet elements are present within the formation. Mudstone-rich mass transport deposits are also extensive. The photos in the lower right contrast the relatively shalier northern Tres Pasos outcrops (e.g., Cerro Divisadero) with the more sandstone-rich southern outcrops (e.g., Picana-Figueroa).

One outcrop from the overlying Dorotea Formation is also included in this fieldguide. The conformable relationship from the shale-dominated upper Tres Pasos Formation to the shallow-marine and deltaic deposits of the Dorotea Formation is documented at Cerro Escondido.

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SEPM Field Trip Guidebook

Stratigraphic Evolution of Deep-Water Architecture: Examples of controls and depositional styles from the Magallanes Basin, southern Chile

Andrea Fildani
Andrea Fildani
Chevron Energy Technology Company, USA
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Stephen M. Hubbard
Stephen M. Hubbard
Department of Geoscience, University of Calgary, Canada
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Brian W. Romans
Brian W. Romans
Chevron Energy Technology Company, USA
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J.A. Covault
J.A. Covault
Chevron Energy Technology Company, USADepartment of Geological and Environmental Sciences, Stanford University, USA
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W.H. Crane
W.H. Crane
Chevron Energy Technology Company, USA
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A. Bernhardt
A. Bernhardt
Department of Geological and Environmental Sciences, Stanford University, USA
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Z.R. Jobe
Z.R. Jobe
Department of Geological and Environmental Sciences, Stanford University, USA
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D.A. Armitage
D.A. Armitage
Department of Geological and Environmental Sciences, Stanford University, USA
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J.C. Fosdick
J.C. Fosdick
Department of Geological and Environmental Sciences, Stanford University, USA
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M.R. Shultz
M.R. Shultz
Chevron Energy Technology Company, USA
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J. Clark
J. Clark
Chevron Energy Technology Company, USA
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D.R. Lowe
D.R. Lowe
Department of Geological and Environmental Sciences, Stanford University, USA
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S.A. Graham
S.A. Graham
Department of Geological and Environmental Sciences, Stanford University, USA
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SEPM Society for Sedimentary Geology
Volume
10
ISBN electronic:
9781565762923
Publication date:
January 01, 2009

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