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Middle Jurassic corals from the Wallowa terrane, west-central Idaho

Published online by Cambridge University Press:  14 July 2015

George D. Stanley Jr.
Affiliation:
Department of Geology, University of Montana, Missoula 59812
Louise Beauvais
Affiliation:
Centre National de la Recherche Scientifique, Institut de Paléontologie, 8 rue de Buffon, 75005 Paris, France

Abstract

New colonial corals from near Pittsburg Landing, Idaho, are clearly dated as Middle Jurassic (Bajocian) in age. They consist of Coenastraea hyatti (Wells) and Thecomeandra vallieri n. sp., and occur abundantly with molluscan fossils in thin, biostromal limestone beds in the Coon Hollow Formation. These fossils are the youngest shelly faunas yet known from the Wallowa terrane. The similarity of the coral and bivalve fauna to endemic faunas of the Western Interior suggests that during Middle Jurassic time, the Wallowa terrane was close enough to the North American craton for faunal exchange with the Western Interior Embayment. The Pittsburg Landing corals appear dissimilar from Middle Jurassic corals known from other terranes of the western Cordillera.

Type
Research Article
Copyright
Copyright © The Paleontological Society 

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