- Usage in publication:
-
- Astoria group
- Modifications:
-
- Original reference
- AAPG geologic province:
-
- Oregon-Washington Coast Ranges province
Summary:
Pg. 223-227. Astoria group. The Astoria shales and Astoria sandstones appear to form part of a single series varying in character according to fluctuations in sedimentation, the shales being more argillaceous, the sandstones more arenaceous, neither possessing an exclusive character, the fossils appearing to be the same Miocene species in both, with tendency to form concretions around them in the shale and to be represented by casts in the sandstones. The name Astoria group (from Astoria, Clatsop Co.) is proposed to include them both, but not the subjacent Eocene ATURIA bed. Dana regards the sandstones more recent than the shales, and this is strengthened by fact that fissures in the shales are filled with sand resembling that of which the sandstones are composed.
Source: US geologic names lexicon (USGS Bull. 896, p. 85).
- Usage in publication:
-
- Astoria groupâ€
- Modifications:
-
- Abandoned
- AAPG geologic province:
-
- Oregon-Washington Coast Ranges province
Summary:
[Astoria group] has been discarded, because Astoria shale has priority and is more useful name. The ATURIA zone is now considered to be Miocene, and is included in Astoria shale.
Source: US geologic names lexicon (USGS Bull. 896, p. 85).
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 ([ ]).