|Name||Smalls Falls Formation, undivided|
|Geologic age||Upper to Middle Silurian (Ludlovian and Wenlockian)|
Metamorphic > Schistthinly bedded sulfidic-graphitic schist
Metamorphic > Granoblastic > Granofelspyrrhotitic calc-silicate granofels
|Comments||Part of the Central Maine Composite Terrane (Central Maine Trough) - Variably metamorphosed sedimentary and volcanic rocks of greenschist to granulite facies, locally migmatized. Area includes structural belts between the Monroe fault on the west and the Campbell Hill fault on the east; that is, the Bronson Hill anticlinorium, Piedmont allochthon, Kearsarge-central Maine synclinorium, central New Hampshire anticlinorium, and Rochester-Lebanon (Maine) antiformal synclinorium.|
Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock Geologic Map of New Hampshire: Reston, VA, U.S. Geological Survey Special Map, 2 sheets, scale 1:250,000.
Nielson, D.L., 1981, The bedrock geology of the Hillsboro quadrangle, New Hampshire: New Hampshire Department of Resources and Economic Developement Bulletin 8, 76 p.
|Counties||Belknap - Carroll - Coos - Grafton - Hillsborough - Merrimack - Rockingham - Strafford|