Clough Formation (VTSc;2)

State	Vermont
Name	Clough Formation
Geologic age	Silurian
Original map label	Sc
Comments	Part of Eastern Vermont
Primary rock type	conglomerate
Secondary rock type	mica schist
Other rock types	quartzite
Lithologic constituents	Major Sedimentary > Clastic > Conglomerate (Bed)Boulders, cobbles, pebbles and angular fragments of quartzite, micaceous quartzite, and gray mica schist in matrix of dark gray quartz-mica schist or quartzite. Minor Metamorphic > SchistBoulders, cobbles, pebbles and angular fragments of quartzite, micaceous quartzite, and gray mica schist in matrix of dark gray quartz-mica schist or quartzite; schist commonly contains porphyroblasts of biotite, less commonly garnet. Metamorphic > Metasedimentary > Metaclastic > QuartziteBoulders, cobbles, pebbles and angular fragments of quartzite, micaceous quartzite, and gray mica schist in matrix of dark gray quartz-mica schist or quartzite.
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. [http://pubs.er.usgs.gov/publication/ofr20061272]
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.