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Outcrop 7. Wildcat Channel Complex Axis-to-Margin Architecture, Sierra del Toro

By
Z.R. Jobe
Z.R. Jobe
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A. Bernhardt
A. Bernhardt
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S.M. Hubbard
S.M. Hubbard
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D.R. Lowe
D.R. Lowe
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Published:
January 01, 2009

Abstract

Outcrop accessibility: difficult Outcrop Coordinates: 51.0852°S, 72.6541°W Refer to outcrop 7 on location map

The Wildcat channel complex is up to 5–6 km wide and 330 m thick, making it the largest exposed on Sierra del Toro. Hubbard and Shultz (2008) suggest that this channel complex is stratigraphically equivalent to the upper two-thirds of the conglomeratic portion of the Cerro Toro Formation at Cerro Castillo, located due south of Sierra del Toro adjacent to the south shore of Lago del Toro. A portion of the eastern Wildcat channel margin was characterized by Hubbard et al. (2008b) (outcrop featured in Fig. 7.2E, referred to as “Sarmiento Vista” by Hubbard et al., 2008b).

The eastern margin of the Wildcat channel complex is well exposed on the northeast face of the mountain, displaying 200 m of conglomeratic channel fill thinning until its final pinchout (Figs. 7.1B and 7.2). This exposure allows for a direct correlation of beds along a ~3 km transect oblique to depositional strike (1.5 km when projected parallel to strike; Fig. 7.3). The slope of the margin averages approximately 7.5° over this distance, although it is partitioned into a steep ‘wall’ at its base, near the channel complex axis, and a shallower ramp nearer the final pinchout (Fig. 7.3). As a result, the eastern margin is characterized by a “steerhorn” cross-sectional profile. Paleoflow measurements taken at the margin of the channel complex

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Contents

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
1.
Chevron Energy Technology Company, USA
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Stephen M. Hubbard
Stephen M. Hubbard
2.
Department of Geoscience, University of Calgary, Canada
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Brian W. Romans
Brian W. Romans
1.
Chevron Energy Technology Company, USA
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J.A. Covault
J.A. Covault
1.
Chevron Energy Technology Company, USA
3.
Department of Geological and Environmental Sciences, Stanford University, USA
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W.H. Crane
W.H. Crane
1.
Chevron Energy Technology Company, USA
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A. Bernhardt
A. Bernhardt
3.
Department of Geological and Environmental Sciences, Stanford University, USA
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Z.R. Jobe
Z.R. Jobe
3.
Department of Geological and Environmental Sciences, Stanford University, USA
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D.A. Armitage
D.A. Armitage
3.
Department of Geological and Environmental Sciences, Stanford University, USA
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J.C. Fosdick
J.C. Fosdick
3.
Department of Geological and Environmental Sciences, Stanford University, USA
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M.R. Shultz
M.R. Shultz
1.
Chevron Energy Technology Company, USA
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J. Clark
J. Clark
1.
Chevron Energy Technology Company, USA
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D.R. Lowe
D.R. Lowe
3.
Department of Geological and Environmental Sciences, Stanford University, USA
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S.A. Graham
S.A. Graham
3.
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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