- Usage in publication:
-
- Butte Valley basalt
- Modifications:
-
- Named
- Dominant lithology:
-
- Basalt
- AAPG geologic province:
-
- Cascades province
Summary:
Occurs at southern end of Butte Valley around Jerome, Macdoel 30' quad, Siskiyou Co, CA. Extends east and probably north of quad. Consists of almost horizontal sheet of black, vesicular olivine basalt dotted with schollendomes. Is 80 feet thick at bottom of Mount Hebron grade on U.S. HWY 97. Overlies dark volcanic sand. Age given as Recent [Holocene].
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Butte Valley basalt*
- Modifications:
-
- Adopted
- Age modified
- AAPG geologic province:
-
- Cascades province
Summary:
Butte Valley basalt of Williams (1949) is adopted. Unit exposed in southern and southeastern parts of Butte Valley and in Red Rock Valley over a 75-sq-mi area and in subsurface about 27-sq-mi area. Overlies and is interstratified with lake deposits of Pleistocene(?) age. Thickness is about 80 ft (average of 40 ft). Map legend and stratigraphic section shows age is Pleistocene and Recent [Holocene].
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 ([ ]).