Late Cretaceous (earliest Campanian/Maastrichtian) evolution of western shorelines of the North American Western Interior Seaway in relation to known mammalian faunas
Published:January 01, 1990
Jason A. Lillegraven, Lawrence M. Ostresh, Jr., 1990. "Late Cretaceous (earliest Campanian/Maastrichtian) evolution of western shorelines of the North American Western Interior Seaway in relation to known mammalian faunas", Dawn of the Age of Mammals in the northern part of the Rocky Mountain Interior, North America, Thomas M. Bown, Kenneth D. Rose
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A series of 33 Late Cretaceous (earliest Campanian through Maastrichtian) paleoshoreline maps was developed to document the migrational evolution of the western edge of the North American Western Interior Seaway. The maps represent a geologic span of roughly 18 million years, and portray the estimated positions of the strandline for each standard Western Interior ammonite zone, beginning with the Clioscaphites choteauensis zone and continuing to the end of the Mesozoic. We attempted correlation of all significant mammal-bearing localities known from the Western Interior with the ammonite-based marine zonation. First approximations of correspondence between ammonite zones and North American Land-Mammal “Ages”...
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Dawn of the Age of Mammals in the northern part of the Rocky Mountain Interior, North America
- Fruitland Formation
- Kirtland Shale
- landform evolution
- North America
- planar bedding structures
- quantitative analysis
- sea-level changes
- sedimentary structures
- South Dakota
- United States
- Upper Cretaceous
- Western Canada
- Western Interior
- Clioscaphites choteauensis
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