Usage:
Elephant Rock Granite (CO*)
Geologic age:
Mesoproterozoic*
Type section, locality, area and/or origin of name:
Type locality (loc. X): in an abandoned train tunnel just south of pinnacle named Elephant Rock, about 4 km northeast of town of Buena Vista, in NE/4 sec. 31, T. 13 S., R. 78 W., Lat. 38 deg. 52 min. 38 sec. N., Long. 106 deg. 08 min. 44 sec. W., Harvard Lakes 7.5-min quadrangle, Chaffee Co., central CO. Named from Elephant Rock (Kellogg and others, 2017, USGS Sci. Inv. Map SIM-3382, scale 1:50,000, p. 54).
AAPG geologic province:
Eagle 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 ([ ]).