Some American Cretaceous fish scales, with notes on the classification and distribution of Cretaceous fishes
Professional Paper
120-I
By: T.D.A. Cockerell
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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.
Suggested Citation
Cockerell, T., 1919, Some American Cretaceous fish scales, with notes on the classification and distribution of Cretaceous fishes: U.S. Geological Survey Professional Paper 120, 37 p., https://doi.org/10.3133/pp120I.
ISSN: 2330-7102 (online)
Study Area
| 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 |
| DOI | 10.3133/pp120I |
| Year Published | 1919 |
| Language | English |
| Description | 37 p. |
| First page | 165 |
| Last page | 202 |
| Country | United States |
| State | Colorado;Missouri;Montana;Wyoming |