Preliminary chemical and mineralogical analyses of the major volcanic ash beds in the Oligocene Brule Formation, northwestern Nebraska
By: Kendell A. Dickinson
Contributors: Geological Survey (U.S.)
Series: Open-file report -- 94-292; U.S. Geological Survey open-file report -- 94-292
Publisher: U.S. Dept. of Interior, U.S. Geological Survey; Open-File Reports Section, distributor]
Published: 1994
Place of publication: [Reston, Va.]; [Denver, Colo
Language: eng
Format: Microform
Subjects: Geology, Stratigraphic -- Oligocene; Groups (Stratigraphy) -- Nebraska -- Dawes County; Mines and mineral resources -- Nebraska -- Dawes County
Notes: Cover title

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