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Map showing publication footprint
  • Usage in publication:
    • Starvation Flat Quartz Monzonite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Quartz monzonite
  • AAPG geologic province:
    • Okanogan province
Publication:

Clark, L.D., and Miller, F.K., 1968, Geology of the Chewelah Mountain quadrangle, Stevens County, Washington: Washington Division of Mines and Geology, Geologic Map, GM-5, 1 sheet, 6 p., scale 1:62,500


Summary:

Unit is named the Starvation Flat Quartz Monzonite. Consists of mostly medium- to coarse-grained, nonporphyritic, hypidiomorphic granular pink potassium feldspar hornblende-biotite quartz monzonite. Intrudes Precambrian and Cambrian metasedimentary rocks; intruded by leucocratic dikes related to the Cretaceous Phillips Lake Granodiorite. Age is Mesozoic(?). (B1520)

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


Map showing publication footprint
  • Usage in publication:
    • Starvation Flat Quartz Monzonite*
  • Modifications:
    • Age modified
    • Geochronologic dating
  • AAPG geologic province:
    • Okanogan province
Publication:

Miller, F.K., and Clark, L.D., 1975, Geology of the Chewelah-Loon Lake area, Stevens and Spokane Counties, Washington, with a section on potassium-argon ages of the plutonic rocks by Joan C. Engels: U.S. Geological Survey Professional Paper, 806, 74 p., (incl. geologic map, scale 1:62,500)


Summary:

Age of the Starvation Flat Quartz Monzonite is revised from Mesozoic(?) to: Cretaceous, based on radiometric (K-Ar) ages of 97 +/-3 Ma (hornblende) and 98 +/-3 Ma (biotite).

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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