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Physical Sciences and Mathematics Commons

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Earth Sciences

UNLV Theses, Dissertations, Professional Papers, and Capstones

Theses/Dissertations

2009

Basins (Geology); Formations (Geology); Geology; Geology--Fieldwork; Paleogeography

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Full-Text Articles in Physical Sciences and Mathematics

The Sheep Pass Formation, A Record Of Late Cretaceous And Paleogene Extension Within The Sevier Hinterland, East-Central Nevada, Peter Alexander Druschke May 2009

The Sheep Pass Formation, A Record Of Late Cretaceous And Paleogene Extension Within The Sevier Hinterland, East-Central Nevada, Peter Alexander Druschke

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Sevier hinterland of western North America is considered by many to be an ancient proxy for the modern Andean Puna-Altiplano or Tibetan Plateau. However, controversies exist as tectonic setting and overall paleogeography of the Sevier hinterland during the Late Cretaceous and Paleogene. The Sheep Pass Formation type section within the southern Egan Range of east-central Nevada comprises a > 1 km thick sedimentary succession spanning the latest Cretaceous to Eocene, and provides a rare opportunity to test prevailing tectonic and paleogeographic models for the Sevier hinterland. New 1:12,000 scale field mapping inthe southern Egan Range indicates that up to three …