Madrid and Smalls Falls Formations, undivided (NHSmsf;0)

State	New Hampshire
Name	Madrid and Smalls Falls Formations, undivided
Geologic age	Silurian
Original map label	Smsf
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.
Primary rock type	granofels
Secondary rock type	schist
Other rock types	calc-silicate schist; pelitic schist
Lithologic constituents	Major Metamorphic > Granoblastic > Granofelsmassive to weakly foliated, purple biotite-feldspar granofels, pyrrhotitic calc-silicate granofels Metamorphic > Schistdark pelitic-sulfidic schist, sulfidic-graphitic schist Minor Metamorphic > Metasedimentary > Calc-silicate-rocklayered calc-silicate, dark pelitic-sulfidic schist containing calc-silicate pods in upper member
Map references	Bennett, D. S, , Wittkop, C.A., and Dicken, C.L., 2006 , Bedrock Geologic Map of New Hampshire - A Digital Representation of the Lyons and others 1997 map and ancillary files: U.S. Geological Survey Data Series 215, scale 1:250,000, CD-ROM. [http://pubs.er.usgs.gov/publication/ds215]
Unit references	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, 1:250,000, 2 sheets.
Geographic coverage	Carroll - Cheshire - Coos - Grafton