Glens Falls Formation, Shoreham Member (VTOgs;0)

Glens Falls Formation, Shoreham Member - Interbedded limestone and shale, contains Cryptolithus tesselatus and Prasopora orientalis. (Glens Falls Formation: Thin bedded, dark blue-gray, rather coarsely granular and highly fossiliferous limestone.)

State	Vermont
Name	Glens Falls Formation, Shoreham Member
Geologic age	Ordovician
Original map label	Ogs
Comments	Part of Champlain and Vermont Valleys, Trenton Group
Primary rock type	limestone
Secondary rock type	shale
Other rock types
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed)contains Cryptolithus tesselatus and Prasopora orientalis Sedimentary > Carbonate > Limestone (Bed)contains Cryptolithus tesselatus and Prasopora orientalis
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.
Geographic coverage	Grand Isle