Implications of Orogenic Wedge Growth, Intraplate Stress Variations, and Eustatic Sea-Level Change for Foreland Basin Stratigraphy—Inferences from Numerical Modeling
Tim Peper, Ronald Van Balen, Sierd Cloetingh, 1995. "Implications of Orogenic Wedge Growth, Intraplate Stress Variations, and Eustatic Sea-Level Change for Foreland Basin Stratigraphy—Inferences from Numerical Modeling", Stratigraphic Evolution of Foreland Basins, Steven L. Dorobek, Gerald M. Ross
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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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Stratigraphic Evolution of Foreland Basins - A strong case can be made that foreland basins are where the casual links between sedimentation and tectonic events were first recognized, as evidenced by the interpretations of geologists working in classic foreland areas. This Special Publication was derived from a Research Symposium entitled ?Stratigraphic Sequences in Foreland Basins ?held at the AAPG-SEPM joint annual meeting on June, 1992, in Calgary, Alberta, Canada. This volume provides a well-balanced perspective of current research on foreland basin stratigraphy and also serves as another element in the evolving framework that comprises our understanding of foreland basins. Given that so many of earth?s resources are found in foreland basins and that foreland basin strata often provide the only preserved record of the tectonic events that led to basin development, the impetus for continued studies of foreland basin strata should remain for many generations of geologists to come.