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Some American Cretaceous fish scales, with notes on the classification and distribution of Cretaceous fishes

Professional Paper 120-I

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Abstract

Fish remains are extremely abundant in several Cretaceous formations of the Rocky Mountains and Great Plains, but except in the Niobrara formation of Kansas, a fish skeleton well enough preserved for description or identification is the greatest rarity. The fishes are represented by separate scales, in some places associated with a few vertebrae and other fragmentary bones or by isolated teeth. In the original descriptions of both the Mowry and the Aspen shales of Wyoming the presence of fish scales is mentioned as a characteristic feature. Fossils of other classes are usually very rare in beds containing many fish scales. Many of the scales are beautifully preserved and show varied forms and more or less complex structure.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Some American Cretaceous fish scales, with notes on the classification and distribution of Cretaceous fishes
Series title:
Professional Paper
Series number:
120
Chapter:
I
Year Published:
1919
Language:
English
Description:
37 p.
First page:
165
Last page:
202
Country:
United States
State:
Colorado;Missouri;Montana;Wyoming