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Airfall tuff in the Browns Park Formation, northwestern Colorado and northeastern Utah.

Mountain Geologist

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Abstract

Bedded airfall tuffs, mainly rhyolitic in composition and locally very thick, occur throughout the Browns Park Formation (upper Oligocene to upper Miocene) in northwestern Colorado and northeasternmost Utah. They have received only cursory attention other than for the purpose of radiometric dating. The present writer began study of the tuffs in 1980, hoping to use them as time-stratigraphic marker beds within the formation. Several tuff-rich stratigraphic sections were measured and numerous samples were collected. The results of petrographic and petrochemical studies of these samples are presented. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Airfall tuff in the Browns Park Formation, northwestern Colorado and northeastern Utah.
Series title:
Mountain Geologist
Volume
22
Issue:
3
Year Published:
1985
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Mountain Geologist
First page:
110
Last page:
127