Shorter contributions to the stratigraphy and geochronology of Upper Cretaceous rocks in the Western Interior of the United States
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| Hlavní autoři: | , |
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| Další autoři: | , , |
| Typ dokumentu: | Kniha |
| Jazyk: | Angličtina |
| Vydáno: |
Washington :
United States Government Printing Office,
1995
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| Edice: | U.S. Geological Survey bulletin ;
2113 |
| Témata: |
Obsah:
- Ch. A. Conglomerate facies and contact relationships of the Upper Cretaceous upper part of the Frontier Formation and lower part of the Beaverhead Group, Lima Peaks area, southwestern Montana and southeastern Idaho / by T.S. Dyman, J.C. Haley, and W.J. Perry, Jr.
- Ch. B. U-Pb ages of volcanogenic zircon from porcellanite beds in the Vaughn member of the mid-Cretaceous Blackleaf Formation, southwestern Montana / by R.E. Zartman ... [et al.]
- Ch. C. Occurrences of the free-swimming Upper Cretaceous crinoids Uintacrinus and Marsupites in the western interior of the United States / by William A. Cobban