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Geologic Unit: Hermon
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Map showing publication footprint
  • Usage in publication:
    • Hermon type
  • Modifications:
    • First used
  • Dominant lithology:
    • Granite
  • AAPG geologic province:
    • Adirondack uplift
Publication:

Buddington, A.F., 1929, Granite phacoliths and their contact zones in the northwest Adirondacks: New York State Museum Bulletin, no. 281, p. 51-107.


Summary:

Pg. 52-81. Hermon type. Name applied to a porphyritic granite in northwestern Adirondacks (Lewis and Jefferson Counties) intrusive into Grenville series. Origin of name not stated. Age relations to nonporphyritic Alexandria type of granite not determined.

Source: US geologic names lexicon (USGS Bull. 896, p. 945).


Map showing publication footprint
  • Usage in publication:
    • [Hermon granite gneiss]
  • Modifications:
    • [Overview]
  • AAPG geologic province:
    • Adirondack uplift
Publication:

Buddington, A.F., 1939, Adirondack igneous rocks and their metamorphism: Geological Society of America Memoir, 7, 354 p.


Summary:

Pg. 142-145. Typical Hermon type of granite is moderately coarsely porphyritic augen gneiss, with phenocrysts of feldspar in coarse- to medium-grained ground mass. Borders Antwerp type granite. Granite occurs in sheet in Greenville belt.
Occurs in sheet extending from Hermon, St. Lawrence Co., to Evans Mills.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1742).


Map showing publication footprint
  • Usage in publication:
    • Hermon Granite*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Adirondack uplift
Publication:

Rankin, D.W. (editor), Chiarenzelli, J.R., Drake, A.A., Jr., Goldsmith, Richard, Hall, L.M., Hinze, W.J., Isachsen, Y.W., Lidiak, E.G., McLelland, James, Mosher, Sharon, Ratcliffe, N.M., Secor, D.T., Jr., and Whitney, P.R., 1993, Proterozoic rocks east and southeast of the Grenville Front, IN Reed, J.C., Jr., and others, eds., Precambrian; conterminous U.S.: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. C-2, p. 335-461.


Summary:

Revised as Hermon Granite somewhat following usage of Buddington (1939). Exposed within Adirondack Lowlands as numerous concordant sheets of granite gneiss. Age is Middle Proterozoic. Report includes geologic maps, correlation charts, and isotopic data.

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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