U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Ute Ridge

Usage:

Ute Ridge Tuff (CO*)


Geologic age:

early Tertiary (early Oligocene; Rupelian)*


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

Type area: lower slopes of Ute Ridge, south of upper Rio Grande, Rio Grande Pyramid 7.5-min quadrangle, Hinsdale Co., southwestern CO (Lipman and others, 1973).


AAPG geologic province:

San Juan Mountains province*


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).