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The AAPG/Datapages Combined Publications Database

Montana Geological Society

Abstract

MTGS-AAPG

Montana Geological Society: 1989 Field Conference Guidebook: Montana Centennial Edition: Geologic Resources of Montana: Volume 1
---, 1989

Pages 189 - 203

RECONNAISSANCE PALEONTOLOGIC STUDY OF THE KISHENEHN FORMATION, NORTHWESTERN MONTANA AND SOUTHEASTERN BRITISH COLUMBIA

Kurt N. Constenius, (Geology), Amoco Production Company, Box 800, Denver, CO 80201.
Mary R. Dawson, (Mammalian Paleontology), Carnegie Museum of Natural History, 4400 Forbes Avenue, Pittsburgh, PA 15213.
Harold G. Pierce, (Invertebrate Paleontology), University Nebraska State Museum, 617 Bogey Avenue, O'Neill, NE 68763.
Robert C. Walter, (Tephrastratigraphy), Institute of Human Origins, 2453 Ridge Road, Berkeley, CA 94709.
Mark V. H. Wilson, (Paleoichthyology), Department of Zoology, University of Alberta, Edmonton, Alberta, Canada T6G 2E9.

ABSTRACT

The Kishenehn Formation, a sequence of over 11,000 ft (3,350 m) of synorogenic deposits, has yielded fossils that include microfloral and megafloral remains, mollusks, insects, fishes, and mammals that suggest an age range between late Eocene and early Miocene. Radiometric dates from the deposits in the Kishenehn and South Fork basins are within the Oligocene. The fossils provide evidence for a climatic transition from sub-tropical to warm temperate conditions and development of several new taxa.

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