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Map showing publication footprint
  • Usage in publication:
    • Katahdin granite
  • Modifications:
    • Principal reference
  • Dominant lithology:
    • Granite
  • AAPG geologic province:
    • New England province
Publication:

Toppan, F.W., 1932, The geology of Maine: Union College, Department of Geology M.S. thesis, 141 p.


Summary:

Pg. 68-69. Katahdin granite. Lying on eastern boundary of Piscataquis County and extending into Penobscot County, western Maine, is a great mass of granite that represents a denuded batholith of which Mount Katahdin, 5,267 A.T., is most conspicuous feature. In hand specimen it is medium-coarse, even-grained granite tinted slightly pink by the orthoclase feldspar. Intrudes Ripogenous series (Silurian). [Age is Carboniferous(?). On the 1933 geol. map of Maine, by Arthur Keith, this granite is assigned to Carboniferous.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1073-1074).


Map showing publication footprint
  • Usage in publication:
    • Katahdin Granite*
  • Modifications:
    • Revised
    • Redescribed
  • AAPG geologic province:
    • New England province
Publication:

Rankin, D.W., and Hon, Rudolph, 1987, Traveler Rhyolite and overlying Trout Valley and the Katahdin Pluton; a record of basin sedimentation and Acadian magmatism, north-central Maine, IN Roy, D.C., ed., Northeastern Section of the Geological Society of America, Centennial field guide: Geological Society of America, Northeastern Section, The Decade of North American Geology (DNAG), Centennial Field Guide, v. 5, p. 293-301.


Summary:

Katahdin Quartz Monzonite changed to Katahdin Granite to conform to the modern definition of granite.

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


Map showing publication footprint
  • Usage in publication:
    • Katahdin Granite*
  • Modifications:
    • Overview
    • Geochronologic dating
Publication:

Hanson, L.S., Bradley, D.C., and Caldwell, D.W., 1993, Geology and geomorphology of the Acadian Orogen, central Maine, IN Cheney, J.T., and Hepburn, J.C., eds., Field trip guidebook for the northeastern United States; 1993 Boston GSA; Volume 2: University of Massachusetts, Department of Geosciences Contribution, Joint annual meeting of Geological Society of America, and New England Intercollegiate Geological Conference, 85th, Boston, MA, October 25-28, 1993, no. 67, p. CC1-CC27.


Summary:

Katahdin Granite underlies Mount Katahdin and neighboring peaks. The following considerations suggest that magmatism partly predated Acadian deformation: 1) Katahdin pluton truncates regional folds that deform rocks as young as Traveler Rhyolite (Emsian, 394-387 Ma); 2) Traveler Rhyolite, however, forms volcanic carapace of the pluton; 3) pluton itself shows no signs of tectonic deformation; 4) deformation within contact aureole appears less intense than outside aureole; and 5) isotopic ages from pluton are widely scattered and inconsistent with stratigraphic constraints. Loiselle and others (1983) reported a 207Pb/206Pb zircon age of 414 +/-4 Ma and a Rb/Sr whole rock age of 388 +/-5 Ma; Denning and Lux (1990) reported a 40Ar/39Ar biotite age of 400.1 +/-1.0 Ma.

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


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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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