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National Geologic Map Database

Geologic Unit: Pyramid Lake

Usage:

Pyramid Lake Member of Mount Mazama Formation (CA,NV)


Subunits:

(alphabetical): /Leter Ranch Bed (NV), /Pelican Island Bed (NV), Timber Lake Bed (NV), Trego Hot Springs Bed (CA,NV), /Wono Bed (NV).


Geologic age:

Quaternary
Pleistocene


Type section, locality, area and/or origin of name:

Type section: east shore of Pyramid Lake, 500 m southeast of Pyramid Island, in center NE/4 SW/4 sec. 3, T. 24 N., R. 22 E., Washoe Co., NV (Davis, 1978).


AAPG geologic province:

Great Basin province


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).