Usage:
Echo Lake Granodiorite (CA*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
North shore of Lower Echo Lake, in E/2 sec. 35 and W/2 sec. 36, T. 12 N., R. 17 E., Fallen Leaf Lake 15-min quadrangle, El Dorado Co., CA (John and others, 1981).
AAPG geologic province:
Sierra Nevada province*
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 ([ ]).