U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Jalama
Search archives
Map showing publication footprint
  • Usage in publication:
    • Jalama formation
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Shale
    • Sandstone
  • AAPG geologic province:
    • Santa Maria basin
Publication:

Dibblee, T.W., Jr., 1950, Geology of southwestern Santa Barbara County, California; Point Arguello, Lompoc, Point Conception, Los Olivos, and Gaviota quadrangles: California Division of Mines Bulletin, no. 150, 95 p., (incl. geologic maps, scale 1:62,500)


Summary:

Pg. 23-24, 38 (fig. 2), pls. 1, 2. Jalama formation. Consists of about 4,000 feet of clay shales and sandstones overlying Espada formation (new) and disconformably underlying Eocene Anita shale. At type locality, 2,850 feet exposed; here relationship to overlying Anita shale is accordant. In Santa Rosa hills, overlain by Anita shale and Sierra Blanca limestone with angular unconformity of about 15 deg. Age is Late Cretaceous.
Type locality: divide between Santa Anita and Bulito Canyons, in the Santa Ynez Mountains, Santa Barbara Co., Southern CA.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1908).


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 ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 04:24:29 PM MDT