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Usage:
Frog Lake Till (CA-recognized locally in Donner Pass area)
Geologic age:
Pleistocene
Type section, locality, area and/or origin of name:
Type locality: Frog Lake, a cirque lake about 3.5 mi north of Donner Pass, [Nevada Co.], eastern northern CA. All deposits are within five-eighths mi of cirque wall and between 7,400 and 7,900 ft in elevation (Birkeland, 1964).
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 ([ ]).