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Implications of Orogenic Wedge Growth, Intraplate Stress Variations, and Eustatic Sea-Level Change for Foreland Basin Stratigraphy—Inferences from Numerical Modeling

By
Tim Peper
Tim Peper
Institute of Earth Sciences, Netherlands Research School of Sedimentary Geology, Vrije Universiteit, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands
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Ronald Van Balen
Ronald Van Balen
Institute of Earth Sciences, Netherlands Research School of Sedimentary Geology, Vrije Universiteit, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands
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Sierd Cloetingh
Sierd Cloetingh
Institute of Earth Sciences, Netherlands Research School of Sedimentary Geology, Vrije Universiteit, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands
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Published:
January 01, 1995

Abstract:

In this paper we investigate the relative effects of intraplate stress level fluctuations and eustatic sea-level changes on foreland basin stratigraphy using forward numerical models. The role played by growth of an evolving orogenic wedge is incorporated. The models show that the effect of stress level fluctuations can be as significant as the effect of eustatic sea-level change. Stress level variations and eustasy can be discriminated in models without orogenic wedge growth because of the asymmetric stratigraphic patterns produced by stress. Models with growth of the orogenic wedge, in contrast, show that asymmetric patterns can also be produced by orogenic wedge growth accompanied by an eustatic sea-level drop. Models adopting a stress level relaxation predict patterns compatible to those produced by isostatic rebound. Therefore, it is suggested that backward reconstructions of generic mechanisms for stratigraphic patterns are preferably not based on these patterns only, and require a combination with sediment provenance, petrological, and structural studies.

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Contents

SEPM Special Publication

Stratigraphic Evolution of Foreland Basins

Steven L. Dorobek
Steven L. Dorobek
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Gerald M. Ross
Gerald M. Ross
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SEPM Society for Sedimentary Geology
Volume
52
ISBN electronic:
9781565761766
Publication date:
January 01, 1995

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