- Usage in publication:
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- Polaris olivine latite member (informal)
- Modifications:
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- Original reference
- Dominant lithology:
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- Latite
- AAPG geologic province:
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- Sierra Nevada province
Summary:
Pg. 1453-1464. Polaris olivine latite member of Lousetown Formation. Cannot be accurately dated in reference to other flows in area. No evidence to suggest it is older than Alder Hill basalts (new). At least 20 flows (or groups of flows) recognized in area. Nine flows (or groups of flows) are named and given informal member status in Lousetown Formation. Age is early Pleistocene.
Mapped in vicinity of settlement of Polaris, Truckee area, north of Lake Tahoe, northeastern CA. [Named from Polaris, in sec. 7, T. 17 N., R. 17 E., Truckee 15-min quadrangle, Nevada Co., northeastern CA.]
Source: US geologic names lexicon (USGS Bull. 1350, p. 587); supplemental information from GNU records (USGS DDS-6; Menlo GNULEX).
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 ([ ]).