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Geological Society of America Special Paper 361

Summary: Geological Society of America
Special Paper 361
Mammals from the end of the age of dinosaurs in North Dakota
and southeastern Montana, with a reappraisal of geographic
differentiation among Lancian mammals
John P. Hunter*
Department of Anatomy, New York College of Osteopathic Medicine of New York Institute of Technology,
Old Westbury, New York 11568, USA
J. David Archibald*
Department of Biology, San Diego State University, San Diego, California 92182, USA
An end-Cretaceous nonavian dinosaur extinction and an early Paleocene mam-
malian radiation is documented primarily in stratigraphic sequences in eastern Mon-
tana. To determine how representative these sequences are, we extended investigation
of this Cretaceous-Tertiary (K-T) transition to new areas. Studies in southwestern
North Dakota and southeastern Montana provide new records of mammals through
the last 1.321.68 million years of the Cretaceous and extending into the Paleocene,
allowing us to evaluate mammalian faunal differentiation across the geographic land-


Source: Archibald, J. David - Department of Biology, San Diego State University


Collections: Biology and Medicine; Geosciences