Shorter contributions to the stratigraphy and geochronology of Upper Cretaceous rocks in the Western Interior of the United States.
Series: U.S. Geological Survey bulletin ;; 2113
Publisher: U.S. G.P.O.
Published: 1995
Place of publication: Washington
Language: eng
Number of pages: 16
Subjects: Geology, Stratigraphic -- Cretaceous.; Geology -- Montana.
Notes: Includes bibliographical references.
Table of contents: value: 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.; value: 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.]; value: 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.