Devonian Seboomook Formation Day Mountain member (MEDsd;0)

State	Maine
Name	Devonian Seboomook Formation Day Mountain member
Geologic age	Devonian
Original map label	Dsd
Comments	Day Mountain raised in rank to formation and assigned to Seboomook Group following usage of Pollock (1987). Occurs in central Maine trough in west-central ME. Consists of metasandstone, metasiltstone, and pelitic schist. Includes separately mapped lenses of granule conglomerate and impure limestone. (ME004) Unit description from USGS GEOLEX website (ME078). AA - Low rank amphibolite facies AB - Medium rank amphibolite facies AC - High rank amphibolite facies E - Epidote-amphibolite facies GS - Greenschist facies Protolith Q - Interbedded pelite and sandstone
Primary rock type	metasedimentary rock
Secondary rock type	schist
Other rock types
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > MetasiltstoneProtolith Q - Interbedded pelite and sandstone AA - Low rank amphibolite facies AB - Medium rank amphibolite facies AC - High rank amphibolite facies E - Epidote-amphibolite facies GS - Greenschist facies Metamorphic > Metasedimentary > Metaclastic > Pelitic-schistProtolith Q - Interbedded pelite and sandstone AA - Low rank amphibolite facies AB - Medium rank amphibolite facies AC - High rank amphibolite facies E - Epidote-amphibolite facies GS - Greenschist facies Metamorphic > Metasedimentary > Metaclastic > MetasandstoneProtolith Q - Interbedded pelite and sandstone AA - Low rank amphibolite facies AB - Medium rank amphibolite facies AC - High rank amphibolite facies E - Epidote-amphibolite facies GS - Greenschist facies
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. [http://apollo.ogis.state.me.us/catalog/catalog.asp?state=2&extent=cover#bedrock]
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. [http://pubs.er.usgs.gov/publication/i1898D] USGS Geologic Names Lexicon (GEOLEX) [http://ngmdb.usgs.gov/Geolex/]
Geographic coverage	Franklin - Oxford - Somerset