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Geologic Unit: Mellen
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Map showing publication footprint
  • Usage in publication:
    • Mellen Intrusive Complex*
  • Modifications:
    • Redescribed
  • Dominant lithology:
    • Gabbro
  • AAPG geologic province:
    • Lake Superior region
Publication:

Hubbard, H.A., 1975, Lower Keweenawan volcanic rocks of Michigan and Wisconsin: U.S. Geological Survey Journal of Research, v. 3, no. 5, p. 529-541.


Summary:

Redescribed from Mellen Gabbro to Mellen Intrusive Complex for area in northern WI in vicinity of Mellen in Lake Superior region. May correlate with unnamed 125-ft-thick diorite of medial Powder Mill Group (new) in sec 17, T47N, R47W on Montreal River in northwest MI. Geologic map. Is part of late Precambrian lower Keweenawan sequence.

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


Map showing publication footprint
  • Usage in publication:
    • Mellen Intrusive Complex*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Wisconsin arch
Publication:

Cannon, W.F., Woodruff, L.G., Nicholson, S.W., and Hedgman, C.A., 1996, Bedrock geologic map of the Ashland and northern part of the Ironwood 30' x 60' quadrangles, Wisconsin and Michigan: U.S. Geological Survey Miscellaneous Investigations Series Map, I-2566, 1 sheet, scale 1:100,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_13052.htm]


Summary:

Mellen Intrusive Complex includes granite body informally called Mellen granite by numerous workers, and Mineral Lake intrusion. These rocks were dated at 1102 Ma (Cannon and others, 1993).

Source: GNU records (USGS DDS-6; Reston 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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