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Silurian Rangeley Formation "A" member lithic sandstone"

Silurian Rangeley Formation "A" member lithic sandstone
StateMaine
NameSilurian Rangeley Formation "A" member lithic sandstone"
Geologic ageSilurian
Original map labelSrac
CommentsIn western sequence of central Maine trough, divided into a main body, lower member near Woodstock (schist and granofels probably equivalent to member B), upper member near Woodstock (schist and granofels probably equivalent to member C), member A (in turn divided into gray shale and massive sandstone facies, massive sandstone facies, and polymict conglomerate facies), member B (in turn divided into quartz-rich, polymictic conglomerate facies and gray shale and sandstone facies), and member C (in turn divided into quartz conglomerate, sandstone, and gray shale; impure limestone and quartz conglomerate lenses; and upper gray shale and sandstone). (ME004) Unit description from USGS GEOLEX website (ME078). E - Epidote-amphibolite facies AA - Low rank amphibolite facies AB - Medium rank amphibolite facies Protolith H - Lithic sandstone and conglomerate
Primary rock typesandstone
Secondary rock typeconglomerate
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > ConglomerateE - Epidote-amphibolite facies AA - Low rank amphibolite facies AB - Medium rank amphibolite facies Protolith H - Lithic sandstone and conglomerate
Sedimentary > Clastic > SandstoneE - Epidote-amphibolite facies AA - Low rank amphibolite facies AB - Medium rank amphibolite facies Protolith H - Lithic sandstone and conglomerate
Map references
Digital bedrock data downloaded from Maine Office of GIS in September 2005 from http://apollo.ogis.state.me.us/catalog/catalog.asp?state=2&extent=cover#bedrock Bedrock units table (publication date 11/15/2002) downloaded from same site. Permission to redistribute these data granted by Dr. Robert Marvinney, State Geologist of Maine, in September 2006.
Unit references
Osberg, P. H., Hussey, A.M., and Boone, G. M., 1985, Bedrock geologic map of Maine: Maine Geological Survey, Dept. of Conserv., scale 1:500,000.
Moench, R.H., Boone, G.M., Bothner, W.A., Boudette, E.L., Hatch, N.L., Jr., Hussey, A.M., III, Marvinney, R.G. and Aleinikoff, J.N., 1995, Geologic map of the Sherbrooke-Lewiston area, Maine, New Hampshire, and Vermont, United States, and Quebec, Canada: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1898-D, 56 p., 2 sheets, scale 1:250,000, Prepared in cooperation with the Maine Geological Survey and the New Hampshire Geological Survey.
USGS Geologic Names Lexicon (GEOLEX)
Geographic coverageFranklin - Oxford

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