Title
High-level strata containing early Miocene mammals on the Bighorn Mountains, Wyoming
Title Variants
Alternative:
Early Miocene mammals
Related Titles
Series:
American Museum novitates, no. 2490
By
McKenna, Malcolm C.
Love, J. D. (John David), (John David) 1913-2002
Darton, Nelson Horatio, 1865-1948
Type
Book
Material
Published material
Publication info
New York, N.Y, American Museum of Natural History, [1972]
Notes
Title from caption.
"May 9, 1972."
"Fossil mammals of early Miocene age have been found in strata composing Darton's Bluff on the crest of the Bighorn Mountains in the Hazelton Peak Quadrangle, Johnson County, Wyoming. Dating the host strata provides a reference datum for the reconstruction of regional sedimentation during early Miocene time and for determination of the maximum age of epeirogenic uplift. As a result of regional aggradation, the Bighorn Basin was filled with sediments. These buried the rugged peaks and canyons of the Bighorn Mountains up to a level corresponding to the present 9000-foot altitude during early Miocene time. The lower Miocene and older rocks are beveled by the subsummit surface, a remarkably flat and even surface of Miocene or Pliocene age. Excavation of the Bighorn and Powder River basins and exhumation of the Bighorn Mountains must have been accomplished during the relatively short interval of late Cenozoic time after the subsummit surface was cut"--P. [1].
Subjects
Bighorn Mountains (Wyo. and Mont.)
,
Geology
,
Geology, Stratigraphic
,
Johnson County
,
Mammals, Fossil
,
Miocene
,
Paleontology
,
Wyoming
Call Number
QL1 .A436 no.2490, 1972
Language
English
Identifiers
OCLC:
45641416
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