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National Geologic Map Database

Geologic Unit: Potosi

Usage:

No current usage.
(†Potosi Volcanic Group (CO,NM) abandoned.)


Geologic age:

Tertiary (Oligocene to Miocene)


Type section, locality, area and/or origin of name:

Named from Potosi Peak, where upper several hundred ft is present, [in northwesternmost corner of Silverton quadrangle, Ouray Co.], southwestern CO (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Paradox basin
Piceance basin
San Juan Mountains province
San Luis basin


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).