Preliminary chemical and mineralogical analyses of the major volcanic ash beds in the Oligocene Brule Formation, northwestern Nebraska

Open-File Report 94-292
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Publication type Report
Publication Subtype USGS Numbered Series
Title Preliminary chemical and mineralogical analyses of the major volcanic ash beds in the Oligocene Brule Formation, northwestern Nebraska
Series title Open-File Report
Series number 94-292
DOI 10.3133/ofr94292
Edition -
Year Published 1994
Language ENGLISH
Publisher U.S. Geological Survey,
Description 36 leaves :ill., map ;28 cm.