- Usage in publication:
-
- Trego Hot Springs Bed
- Modifications:
-
- Named
- AAPG geologic province:
-
- Great Basin province
Summary:
Unit is named the Trego Hot Springs of the Pyramid Lake Member (new) of the Mount Mazama Formation. Is exposed in the Lake Lahontan area as well as in the Pyramid Lake area, northwest to Surprise Valley, CA. Is the most potassium-rich bed of tephra in the Pyramid Lake. Is interbedded with the lower member of the Sehoo Formation. Age is Pleistocene, 35 to 11.5 ka. (B1565)
Source: 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 ([ ]).