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  • Usage in publication:
    • Eagle Lake Gneiss
  • Modifications:
    • Named
  • Dominant lithology:
    • Gneiss
  • AAPG geologic province:
    • Adirondack uplift
Publication:

Wiener, R.W., McLelland, J.M., Isachsen, Y.W., and Hall, L.M., 1984, Stratigraphy and structural geology of the Adirondack Mountains, New York; review and synthesis, IN Bartholomew, M.J., ed., The Grenville event in the Appalachians and related topics: Geological Society of America Special Paper, 194, p. 1-55.


Summary:

Rocks called the "older paragneiss" by Walton and deWaard (1963), are here named the Eagle Lake Gneiss of the Lake George Group. The Eagle Lake is the basal unit of the Lake George Group in the eastern Adirondacks. Consists of thin, discontinuous exposures of biotite-quartz-plagioclase gneiss with granitic layers and veins, and quartzite and quartz-sillimanite gneiss. Unconformably overlies the Piseco Group. Is correlated with the Baldface Hill Gneiss and the Poplar Hill Gneiss of the northern Adirondacks. Age is Proterozoic.

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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