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National Geologic Map Database
Geologic Unit: Patterson
Map showing publication footprint
  • Usage in publication:
    • Patterson Tuff
  • Modifications:
    • Named
  • Dominant lithology:
    • Tuff
    • Bentonite
    • Conglomerate
  • AAPG geologic province:
    • Modoc Plateau province
    • Great Basin province
Publication:

Hulbe, C.W.H., 1980, A note on the geology of the Warner Mountains, IN Kramer, J.C., ed., Geologic guide to the Modoc Plateau and the Warner Mountains: Geological Society of Sacramento Annual Field Trip Guidebook, p. 149-156.


Summary:

Best exposed on east side of Warren Peak and south of Patterson Lake [Warren Peak and Eagle Peak 7.5' quads, Modoc Co CA]. Can be traced for many mi along west slope of range [Warner Mountains]. Is not found north of Parker Creek. Composed of rhyolitic to andesitic pumiceous lapilli tuff with local bentonite. In places to the west it locally contains conglomerates. Stratigraphic chart shows unit overlies Owl Creek Formation (new) and underlies Warren Formation (new). May correlate with Pliocene Alturas Formation of Dorf (1933). Age of units in study area (Warner Mountains) given as Tertiary.

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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