Gile Mountain Formation, Interbedded gray slate or phyllite and brown-weathering calcite-ankerite metasiltstone (NHDgc;0)

State	New Hampshire
Name	Gile Mountain Formation, Interbedded gray slate or phyllite and brown-weathering calcite-ankerite metasiltstone
Geologic age	Lower Devonian
Original map label	Dgc
Comments	Part of the Grenville Terrane (Connecticut Valley Trough).
Primary rock type	slate
Secondary rock type	phyllite
Other rock types	metasedimentary rock; marble; quartzite
Lithologic constituents	Minor Metamorphic > Metasedimentary > Metaclastic > Metasiltstonebrown-weathering calcite-ankerite metasiltstone Metamorphic > Metasedimentary > Metaclastic > Phyllite Metamorphic > Metasedimentary > Metaclastic > Slate Incidental Metamorphic > Metasedimentary > Metaclastic > Quartzite Metamorphic > Metasedimentary > Metacarbonate > Marble
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	Sullivan