Shaw Mountain Formation (VTSs;2)

Shaw Mountain Formation - Chiefly tan to brown weathered quartzose limestone and calcareous quartzite characterized by specks of limonite after ankerite; locally underlain by quartz conglomerate and overlain by blue fossiliferous crystalline limestone; greenstone and quartz-sericite schist.

State	Vermont
Name	Shaw Mountain Formation
Geologic age	Silurian
Original map label	Ss
Comments	Part of Eastern Vermont
Primary rock type	limestone
Secondary rock type	quartzite
Other rock types	conglomerate; greenstone; mica schist
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > Quartzitecalcareous quartzite characterized by specks of limonite after ankerite Sedimentary > Carbonate > Limestone (Bed)chiefly tan to brown weathered quartzose limestone; locally overlain by blue fossiliferous crystalline limestone Incidental Metamorphic > Schistquartz-sericite schist Metamorphic > Metaigneous > Greenstone Sedimentary > Clastic > Conglomerate (Bed)locally underlain by quartz conglomerate
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.