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Review of Interpretations for the Paine Channel Complex at Silla Syncline

By
W.H. Crane
W.H. Crane
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S.M. Hubbard
S.M. Hubbard
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A. Fildani
A. Fildani
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B.W. Romans
B.W. Romans
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Published:
January 01, 2009

Abstract

Multiple models have been proposed to account for the origin of channel and out-of-channel deposits in the Cerro Toro Formation at the Silla Syncline. The complex stratigraphic relationship between coarse-grained channel, and fine-grained out-of-channel deposits has been a topic of considerable debate in the scientific literature. Winn and Dott (1979), Beaubouef et al. (1996), and Beaubouef (2004) propose aggradational channel-levee models for the channel complexes present in the Parque Nacional Torres del Paine (Fig. iv.1A, B). Conversely, Coleman (2000), Crane (2004), and Crane and Lowe (2008) have proposed variations on an evolutionary model that invokes erosional confinement of channel sediments in background Cerro Toro Formation mudstone (Fig. iv.1C, D). The high-energy axial portion of the best-exposed and most well studied channel complex (Paine C of Crane et al., 2008) is a minimum of 4 km wide and the Silla Syncline provides only an oblique cross-section through the complex (Fig. iv.1D). If the system is levee confined, the coeval levees must have added substantially to the cross-sectional width of the channel complex; post-depositional structures both east and west of the syncline limit the preserved width to only slightly more than the channel axis in most areas. As a result it is difficult to discern whether the erosional margins preserved in outcrop represent the edges of an incisional channel complex, or the eroded inner margins of extensive levees.

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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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