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Map showing publication footprint
  • Usage in publication:
    • Junipero sandstone
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Conglomerate
  • AAPG geologic province:
    • California Coast Ranges province
Publication:

Thorup, R.R., 1943, Type locality of the Vaqueros formation [California], IN Jenkins, O.P., and others, Geologic formations and economic development of the oil and gas fields of California; in four parts, including outline geologic map showing oil and gas fields and drilled areas: California Division of Mines Bulletin, no. 118, pt. 2, p. 463-466.


Summary:

Named by author in abstract (1941, GSA Bull. v.52 no.12 pt.2 p.1958) [where type locality designated in upper Reliz Canyon, NE/4 sec.34 T20S R6E, Junipero Serra 15' quad, Monterey Co, CA]. Also outcrops as isolated patches in western part of district at elevation of 2000 to 3000 feet. Consists of white to light-gray, coarse to pebbly, feldspathic, unfossiliferous sandstone and basal conglomerate about 8 feet thick. Is up to 125 feet thick. Unconformably overlies basement complex (Sur series and Santa Lucia quartz diorite). Conformably underlies Lucia shale (new) of Eocene age. Age is Eocene based on conformable relationship with Lucia shale.

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


Map showing publication footprint
  • Usage in publication:
    • Junipero Sandstone Member*
  • Modifications:
    • Adopted
    • Revised
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • California Coast Ranges province
Publication:

Seiders, V.M., Joyce, J.M., Leverett, K.A., and McLean, Hugh, 1983, Geologic map of part of the Ventana Wilderness and the Black Butte, Bear Mountain, and Bear Canyon Roadless Areas, Monterey County, California: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1559-B, 1 sheet, scale 1:50,000


Summary:

Junipero Sandstone of Thorup (1943) reduced in rank and adopted as Junipero Sandstone Member (lowermost) of Reliz Canyon Formation. Described as discontinuous unit of very thick cross-bedded sandstone, conglomeratic sandstone, and conglomerate. Age is late Paleocene(?) and early Eocene on basis of shallow-water algae remains and orbitoid foraminifers of probable Penutian age at one locality (Dickinson, 1965).

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 ([ ]).

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