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National Geologic Map Database

Geologic Unit: Chase Ranch

Usage:

Chase Ranch Quartzite Member of Cressman's Gulch Formation (CO)


Geologic age:

Paleoproterozoic


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

Type area: on a ridge just north of Chase Ranch, in NE/4 sec. 20, T. 2 S., R. 70 W., Ralston Buttes quadrangle, Jefferson Co., CO. Named from Chase Ranch (Lickus and LeRoy, 1968).


AAPG geologic province:

Southern Rocky Mountain region


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 ([ ]).