Usage:
Sharpsdale Formation (CO-recognized locally in Huerfano Co.)
Geologic age:
Middle Pennsylvanian (Atokan to Desmoinesian)
Type section, locality, area and/or origin of name:
Type section: along Huerfano River, in E/2 sec. 23 and NW/4 sec. 13, T. 27 S., R. 72 W., [Mosca Pass 7.5-min quadrangle], northeastern Huerfano Co., central southern CO, as described by D.W. Bolyard (1956, p. 116-125; 1956a, p. 52-53). Named from nearby Sharpsdale, [along Huerfano River near confluens with Manzanares Creek, in NW/4 NW/4 sec. 8, T. 27 S., R. 71 W., Lat. 37 deg. 43 min. 10 sec. N., Long. 105 deg. 21 min. 42 sec. W., Red Wing 7.5-min quadrangle, Huerfano Co., Sangre de Cristo Mountains, central southern CO] (Chronic, 1958).
AAPG geologic province:
Las Vegas-Raton 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 ([ ]).