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Geologic Unit: Uvas
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Map showing publication footprint
  • Usage in publication:
    • Uvas conglomerate member
  • Modifications:
    • Named
  • Dominant lithology:
    • Conglomerate
  • AAPG geologic province:
    • Transverse Ranges province
Publication:

Marks, J.G., 1941, Stratigraphy of the Tejon formation in its type area, Kern County, California [abs.]: Geological Society of America Bulletin, v. 52, no. 12, pt. 2, p. 1922.


Summary:

Type locality designated as Grapevine Canyon, Tehachapi Mountains, Kern Co. [Bissell 7.5' quad], CA. Listed as basal member of the Tejon formation in type area of Tejon. Consists of 100 ft of fossiliferous conglomerate. Includes TUBULOSTIUM TEJONENSIS, ACTINOCYCLINA cf. ASTER, DISCOYCLINA sp. Conformably underlies the Liveoak member (new) (Tejon formation); unconformably overlies basement complex. Age is Eocene based on fossils [foraminifers].

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Uvas Conglomerate Member*
  • Modifications:
    • Adopted
  • AAPG geologic province:
    • Transverse Ranges province
Publication:

Nilsen, T.H., 1972, Stratigraphy and sedimentation of the Tejon Formation, San Emigdio Mountains, California: American Association of Petroleum Geologists, Pacific Petroleum Geology Newsletter, v. 26, no. 1, p. 5.


Summary:

Is thin (0 to 400 ft) discontinuous basal conglomerate and sandstone that rests unconformably on irregular erosion surface of pre-Tertiary basement complex. Contains locally abundant megafauna, boulder beds, breccias, and beach-type sandstones. Grades laterally eastward into the Tecuya Formation. Conformably underlies the Liveoak Shale Member (Tejon Formation). Age is Eocene.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Uvas Conglomerate Member*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Transverse Ranges province
Publication:

Nilsen, T.H., 1973, Continental-margin sedimentation of the Eocene Tejon Formation, western Tehachapi and San Emigdio Mountains, California [abs.]: American Association of Petroleum Geologists Bulletin, v. 57, no. 4, p. 797. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Age is early and middle Eocene based on marine megafauna.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Uvas Conglomerate Member*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Transverse Ranges province
Publication:

Nilsen, T.H., 1987, Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio Mountains, California: U.S. Geological Survey Professional Paper, 1268, 110 p., (incl. geologic map, scale 1:62,500)


Summary:

Measured reference section designated as exposures on west side of Grapevine Creek, 1.75 mi south of Grapevine, S/2 sec. 29, T10N R19W, Grapevine 7.5' quad, Kern Co., CA. Thickness at type is 100.8 ft. Is progressively younger eastward ranging through "Domengine Stage" and "Transition Stage" to "Tejon Stage" east of Grapevine Creek. Age is early and middle Eocene.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Uvas Conglomerate Member*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • California Coast Ranges province
Publication:

Sims, J.D., 1988, Geologic map of the San Andreas fault zone in the Cholame Valley and Cholame Hills quadrangles, San Luis Obispo and Monterey Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1995, 1 sheet, scale 1:24,000


Summary:

Geographically extended to area southeast of Jack Ranch fault near Gold Hill, Monterey Co., CA. Described as conglomerate, poorly exposed, cobbles, and boulders in float; best exposures in shallow stream cut at northeast end of map unit. Boulders consist predominantly of sandstone and hornblende quartz gabbro. Age is shown as Eocene.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


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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 ([ ]).

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