- Usage in publication:
-
- Cascajo conglomerate member*
- Modifications:
-
- Named
- Biostratigraphic dating
- Dominant lithology:
-
- Conglomerate
- Sandstone
- AAPG geologic province:
-
- San Joaquin basin
Summary:
Named as basal member of San Joaquin formation. Type locality designated as Cascajo Hill on west flank of South Dome, Kettleman Hills [Avenal Gap 7.5' quad, Kern Co] San Joaquin Valley, CA. May occur in subsurface of southern San Joaquin Valley. Consists of conglomerate and generally blue sandstone. Average thickness is 50 ft but at places is greater. Overlies Etchegoin formation. Fossils (listed with localities and identified by Ralph Stewart and W.P. Woodring) include coral, echinoids, brachiopod, gastropods, pelecypods, barnacles, fish remains, horse(?) tooth, porpoise and eared seal. Age of San Joaquin formation given as late Pliocene.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Cascajo Conglomerate Member*
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- San Joaquin basin
Summary:
[Age of Cascajo Conglomerate Member of San Joaquin Formation changed to early Pliocene to agree with overall early and late Pliocene age of its parent San Joaquin Formation in Kettleman Hills].
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 ([ ]).