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Syenite

Syenite - Hornblende, biotite, quartz and augite syenites.
StateVermont
NameSyenite
Geologic agePermian-Triassic
Original map labelws
CommentsPart of Plutonic Rocks (Including a few dike rocks and volcanic rocks.), White Mountain Plutonic-Volcanic Series
Primary rock typesyenite
Secondary rock typequartz syenite
Other rock types
Lithologic constituents
Major
Igneous > Plutonic > Syenitic > Syenite (Pluton)Hornblende, biotite, quartz and augite syenites.
Map references
Nicholson, S.W., Dicken, C.L., Horton, J.D., Foose, M.P., Mueller, J.A.L., and Hon, Rudi, 2006, Preliminary integrated geologic map databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, and Vermont: U.S. Geological Survey Open-File Report 2006-1272.
Unit references
Doll, C.G., Cady, W.M., Thompson, J.B., Jr., and Billings, M.P., 1961, Centennial Geologic Map of Vermont: Vermont Geological Survey, Miscellaneous Map MISCMAP-01, scale 1:250,000.
Geographic coverageEssex - Rutland - Windsor

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