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Map showing publication footprint
  • Usage in publication:
    • Bluebird aplite
  • Modifications:
    • Areal extent
  • Dominant lithology:
    • Granite
  • AAPG geologic province:
    • Montana folded belt
Publication:

Weed, W.H., 1899, Granite rocks of Butte, Montana and vicinity: Journal of Geology, v. 7, no. 8, p. 737-750.


Summary:

Bluebird aplite in Boulder batholith. Partial differentiation of granite in upper part of batholith resulted in basic phase (Butte granite), and acidic phase (Bluebird aplite).
Notable exposures in Butte district, [Silver Bow Co.], MT. [Bluebird Mine located at Lat. 46 deg 00 min. 42 sec. N., Long. 112 deg. 35 min. 38 sec. W., Butte North 7.5-min quadrangle, Silver Bow Co., MT.]

Source: Modified from GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Bluebird aplite†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Montana folded belt
Publication:

Wilmarth, M.G., 1936, [Selected Geologic Names Committee remarks (ca. 1910-1937) on Cenozoic rocks and sediment of the western U.S.], IN Wilmarth, M.G., 1938, Lexicon of geologic names of the United States (including Alaska): U.S. Geological Survey Bulletin, 896, pts. 1-2, 2396 p.


Summary:

†Bluebird aplite. A name that was applied by W.H. Weed to the aplite in Butte district, Montana, in Jour. Geol., v. 7, 1899, p. 744-747, and USGS Bull. 213, 1903, p. 170, but which he mapped as "aplite," without geographic name, in USGS Butte Special folio, no. 38, 1897. The geographic name is not considered necessary and is not now [ca. 1938] used by the USGS.

Source: US geologic names lexicon (USGS Bull. 896, p. 217).


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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