Osiris Tuff

Usage of Geologic Unit Name:
Osiris Tuff (UT*)
Miocene, early*
Miocene, middle*
Geologic Province:
Paradox basin*
Wasatch uplift*
Great Basin province*
Areal Extent:

Type Locality:
Type section: near Osiris, east of Utah Hwy 22, SW/4 NW/4 sec. 2, T. 32 S., R. 2 W., near abandoned town of Osiris in southeastern High Plateau, Garfield Co., UT (Anderson and Rowley, 1975).

Unit Name History:
First used as Osiris Formation; Isotopic dating (Damon, 1968). Formally named Osiris Tuff; Isotopic dating (Anderson and Rowley, 1975).


Damon, P.E., 1968, Correlation and chronology of ore deposits and volcanic rocks: U.S. Atomic Energy Commission Annual Progress Report, C00-689-100, 245 p., Contract AT(11-1)-689.

Anderson, J.J. and Rowley, P.D., 1975, Cenozoic stratigraphy of southwestern high plateaus of Utah, IN Cenozoic geology of southwestern high plateaus of Utah: Geological Society of America Special Paper, 160, p. 1-51.

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* show accepted USGS usage.
Note that data on this page contains information that has been partly revised from bibliographic resources available via the National Geologic Map Database GEOLEX:
The URL is: https://gotbooks.miracosta.edu/gonp/coloradoplateau/lexicon/osiris.htm
Last modified: 1/7/2011