Usage:
Pony Spring Member of Maroon Formation (CO)
Subunits:
/Bath Sandstone submember [informal] (CO).
["Submember" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983). Considered informal and should not be capitalized.]
Geologic age:
Middle Pennsylvanian to early Permian
Type section, locality, area and/or origin of name:
Named from Pony Spring, on west side of Pony Park, near northwestern corner sec. 28, T. 12 S., R. 77 W., Park and Chaffee Cos., CO (Gould, 1935).
[Principal reference section]: measured in secs. 20, 29, 32, and 33, T. 12 S., R. 77 W., and in secs. 5 and 16, T. 13 S., R. 77 W., Park Co., CO (Gould, 1935; Stark and others, 1949, p. 152-153).
AAPG geologic province:
Eagle basin
South Park 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 ([ ]).