Usage:
Cochetopa Park Tuff (CO*)
Geologic age:
Tertiary*
Oligocene*
Type section, locality, area and/or origin of name:
Named from Cochetopa Park, Saguache Co., CO (Steven and others, 1974).
["Reference sections"]: (1) typical densely welded tuff forms minor mesa cap just north of county road, about 2,000 ft west of McDonough Ranch headquarters on west side of Cochetopa Park; (2) soft ash-flow tuffs in eastern part of Cochetopa Park caldera best exposed in stream banks, roadcuts, and quarry walls along Archuleta Creek from its confluence with Cochetopa Creek upstream for 3 to 4 mi; (3) stream-sediment facies exposed largely in roadcuts along county road between McDonough Ranch and Cochetopa Creek (Steven and others, 1974).
AAPG geologic province:
San Luis basin*
San Juan Mountains province*
Piceance basin*
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 ([ ]).