Provenance of early Paleogene strata in the Bighorn Basin (Wyoming, USA): Implications for Laramide tectonism and basin-scale stratigraphic patterns

J.L. Welch; B.Z. Foreman; D. Malone; J. Craddock

doi:10.1130/2022.2555(09)

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GSA Special Papers

Tectonic Evolution of the Sevier-Laramide Hinterland, Thrust Belt, and Foreland, and Postorogenic Slab Rollback (180–20 Ma)
CONTAINS OPEN ACCESS

Editor(s)

Geological Society of America

Volume

555

DOI:

https://doi.org/10.1130/SPE555

ISBN electronic:

9780813795553

ISBN print:

9780813725550

Publication date:

May 03, 2022

This Special Paper focuses on the evolution of the crust of the hinterland of the orogen during the orogenic cycle, and describes the evolution of the crust and basins at metamorphic core complexes. The volume includes a regional study of the Sevier-Laramide orogens in the Wyoming province, a regional seismic study, strain analysis of Sevier and Laramide deformation, and detrital zircon provenance from the Pacific Coast to the foreland between the Jurassic and the Eocene.

Book Chapter

Provenance of early Paleogene strata in the Bighorn Basin (Wyoming, USA): Implications for Laramide tectonism and basin-scale stratigraphic patterns

Author(s)

J.L. Welch

Department of Geology, Western Washington University, Bellingham, Washington 98225, USA

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;

B.Z. Foreman

Department of Geology, Western Washington University, Bellingham, Washington 98225, USA

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;

D. Malone

Department of Geography-Geology, Illinois State University, Normal, Illinois 61790, USA

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;

J. Craddock

Department of Geology, Macalester College, Saint Paul, Minnesota 55105, USA

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Doi:

https://doi.org/10.1130/2022.2555(09)

Published:

May 03, 2022

ABSTRACT

The Bighorn Basin (Wyoming, USA) contains some of the most extensively exposed and studied nonmarine early Paleogene strata in the world. Over a century of research has produced a highly resolved record of early Paleogene terrestrial climatic and biotic change as well as extensive documentation of spatiotemporal variability in basin-scale stratigraphy. The basin also offers the opportunity to integrate these data with the uplift and erosional history of the adjacent Laramide ranges. Herein, we provide a comprehensive provenance analysis of the early Paleogene Fort Union and Willwood Formations in the Bighorn Basin from paleocurrent measurements (n > 550...

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Tectonic Evolution of the Sevier-Laramide Hinterland, Thrust Belt, and Foreland, and Postorogenic Slab Rollback (180–20 Ma) CONTAINS OPEN ACCESS

Provenance of early Paleogene strata in the Bighorn Basin (Wyoming, USA): Implications for Laramide tectonism and basin-scale stratigraphic patterns

ABSTRACT

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Tectonic Evolution of the Sevier-Laramide Hinterland, Thrust Belt, and Foreland, and Postorogenic Slab Rollback (180–20 Ma)
CONTAINS OPEN ACCESS