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Geologic Unit: Beecher
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Map showing publication footprint
  • Usage in publication:
    • Beecher Gneiss
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Gneiss
Publication:

Dutton, C.E., and Bradley, R.E., 1970, Lithologic, geophysical, and mineral commodity maps of Precambrian rocks in Wisconsin: U.S. Geological Survey Miscellaneous Investigations Series Map, I-631, 6 sheets, 15 p., scale 1:500,000


Summary:

Sheet 4. Beecher Gneiss. Mapped in northeastern Wisconsin. Described as coarse-grained, finely foliated, pink to gray, granitic gneiss that is locally porphyritic. Is intrusive into Miscauno Formation. Overlies McAllister Formation and unconformably underlies Quinnesec Formation or Pemene Formation. Age is Precambrian W.
Type locality: not stated. Name attributed to J.W. Trow.

Source: US geologic names lexicon (USGS Bull. 1520, p. 23).


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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