- Usage in publication:
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- Yachats Basalt*
- Modifications:
-
- Named
- Dominant lithology:
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- Basalt
- AAPG geologic province:
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- Oregon-Washington Coast Ranges province
Summary:
Unit is named the Yachats Basalt. Consists of gray basalt grading to basaltic andesite and andesite. Maximum thickness is estimated to be about 750 m. Overlies the Tyee Formation; overlaps the Nestucca Formation; underlies unnamed basaltic sandstone and marine siltstone. Age is late Eocene. (B1520)
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 ([ ]).