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National Geologic Map Database
Geologic Unit: Hector
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Map showing publication footprint
  • Usage in publication:
    • Hector Formation
  • Modifications:
    • Original reference
    • Biostratigraphic dating
    • Geochronologic dating
  • Dominant lithology:
    • Sandstone
    • Tuff
  • AAPG geologic province:
    • Mojave basin
Publication:

Woodburne, M.O., Tedford, R.H., Stevens, M.S., and Taylor, B.E., 1974, Early Miocene mammalian faunas, Mojave desert, California: Journal of Paleontology, v. 48, no. 1, p. 6-26.


Summary:

Pg. 6-26. Hector Formation. Consists of (descending): tan-grayish brown tuffaceous sandstone, orangish brown-reddish brown tuffaceous sandstone, brown-brownish gray conglomeratic sandstone, "marker tuff bed," tuffaceous sandstone with coarse conglomeratic sandstone with tuff bed (K-Ar age of 21.0 +/-5 Ma), and coarsely conglomeratic northern facies. Thickness about 1,600 feet (490 m). Unconformably overlies andesitic lahar and agglomerate; unconformably underlies Pleistocene alluvium. Fossils (the Black Butte and Logan Mine local mammal faunas). Age is early Miocene (late Arikareean and early Hemingfordian NALMA).
Type area: 4 mi north of Hector siding of the Atchison, Topeka and Sante Fe RR, in sec. 13, 22, and 26, T. 9 N., R. 5 E., Cady Mountains, San Bernardino Co., southern CA.

Source: Publication.


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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