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Geologic Unit: Hull
Map showing publication footprint
  • Usage in publication:
    • Hull meta-andesite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Andesite
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Diller, J.S., 1908, Geology of the Taylorsville region, California: U.S. Geological Survey Bulletin, 353, 128 p., (incl. geologic maps, scale 1:62,500 and 1:250,000)


Summary:

Unit is named the Hull meta-andesite. Consists of greenish to reddish meta-andesite resembling the Fant meta-andesite. Prevailing type is greenish and essentially non-porphyritic; occasionally in the Little Grizzly Creek region it is decidedly amygdaloidal. Is only partially crystalline. Much of it is in more or less well-defined sheets representing lava flows and tuff. In places is decidedly slaty. It penetrates the Mormon sandstone and Foreman formation. Age is most likely Late Jurassic. (B896)

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


Map showing publication footprint
  • Usage in publication:
    • Hull Meta-andesite*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Imlay, R.W., 1980, Jurassic paleobiogeography of the conterminous United States in its continental setting: U.S. Geological Survey Professional Paper, 1062, 134 p.


Summary:

Age of the Hull Meta-andesite is revised from Late Jurassic to: Middle Jurassic (Bathonian).

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


Map showing publication footprint
  • Usage in publication:
    • Hull Meta-andesite†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Harwood, D.S., 1993, Mesozoic geology of Mt. Jura, northern Sierra Nevada, California; a progress report, IN Dunn, G.C., and McDougall, K.A., eds., Mesozoic paleogeography of the western United States; Pacific Coast paleogeography symposium II: Society of Economic Paleontologists and Mineralogists, Pacific Section, Field Trip Guidebook, May 5, 1993, book 71, p. 263-274.


Summary:

Hull Meta-andesite is abandoned as it is a mixture of volcanic rocks of widely divergent ages that serves only to confuse the stratigraphic an structural relations on Mt. Jura. Its rocks are reassigned to the Fant Meta-andesite and as unnamed rocks.

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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