- Usage in publication:
-
- Paularino member*
- Modifications:
-
- Named
- Biostratigraphic dating
- Dominant lithology:
-
- Sandstone
- Siltstone
- Breccia
- AAPG geologic province:
-
- Transverse Ranges province
Summary:
Named as youngest member (of 3) of Topanga formation from Paularino Ave. near northwest margin of map of San Joaquin Hills. Type area designated north of Bonita Reservoir on Bonita Creek at northwest edge of San Joaquin Hills [Tustin 7.5' quad] Orange Co, CA. Consists primarily of poorly exposed sequence of interbedded sandstone, siltstone, and breccia. Is about 1275 ft thick. Apparently disconformably overlies Los Trancos member (new) of Topanga formation. Unconformably underlies Capistrano formation and unnamed sandstone. Foraminifers from fossil locality in Bonita Creek suggest lower part of Luisian or the Relizian Stages of Kleinpell (1938). Age is middle Miocene.
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 ([ ]).