The Geology and Speleogenesis of Porcupine Cave

Robert G. Raynolds

in Biodiversity Response to Climate Change in the Middle Pleistocene

Published by University of California Press

Published in print February 2004 | ISBN: 9780520240827
Published online March 2012 | e-ISBN: 9780520930858 | DOI:
The Geology and Speleogenesis of Porcupine Cave

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This chapter describes the formation and evolution of Porcupine Cave. Although Cretaceous strata have since been entirely eroded from the vicinity of the cave, one can develop an estimate of what was once there by examining regional facies distribution patterns and subsurface drilling data. The chapter also presents a geological sketch of the vicinity and stratigraphic sections of the Porcupine Cave. After initial weathering in the Paleozoic, the cave strata were deeply buried until uplifted during the Laramide Orogeny. In the late Tertiary, as the region was weathered and underwent at least one episode of aggradation, it is likely that there were multiple times of speleogenesis or cave formation.

Keywords: Porcupine Cave; Cretaceous strata; cave strata; Laramide Orogeny; speleogenesis; cave formation

Chapter.  2700 words.  Illustrated.

Subjects: Evolutionary Biology

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