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National Geologic Map Database
Geologic Unit: Catskin
Map showing publication footprint
  • Usage in publication:
    • Catskin Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Mudstone
    • Shale
    • Sandstone
    • Conglomerate
  • AAPG geologic province:
    • San Joaquin basin
Publication:

Tamesis, E.V., 1967, Cretaceous stratigraphy and sedimentation of the Avenal Ridge-Reef Ridge area, Fresno and Kings Counties, California: Dissertation Abstracts, sec. B, v. 28, no. 1, p. 237.


Summary:

zzzzzArea of report is Avenal Ridge-Reef Ridge area of southern Diablo Range, 200 miles southeast of San Francisco, in Fresno and Kings Counties, west-central California. Eight stratigraphic units ranging from Early to Late Cretaceous are recognized in area, in descending [ascending?] order: Badger Shale, Risco Formation, Johnson Peak Formation, Catskin Formation (new), Lovel Shale (new), Redman [Red Man] Sandstone, Willow Spring Mudstone (new), and Moreno Formation. All rocks are marine of shallow neritic to bathyl depths and consist of thick sequences of mudstone, shale, thin- to thick-bedded concretionary sandstones and conglomerates. Unconformities exist between [Red Man] (Campanian) and Willow Spring (Maastrichtian); [Red Man] and Lovel (Santonian); and Lovel and Catskin (Cenomanian to Coniacian).

Source: US geologic names lexicon (USGS Bull. 1350, p. 130); supplemental information from 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 ( ).

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