About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

Montana Geological Society



Montana Geological Society: 1989 Field Conference Guidebook: Montana Centennial Edition: Geologic Resources of Montana: Volume II, Road Logs
August-September, 1989

Pages x - x

ABSTRACT: 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
Previous HitHaroldTop 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

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.