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Cambrian Hurricane Mountain Formation, metaquartzwacke

Cambrian Hurricane Mountain Formation, metaquartzwacke
StateMaine
NameCambrian Hurricane Mountain Formation, metaquartzwacke
Geologic ageCambrian
Original map labelCAhqw
CommentsConsists of dark, rusty-weathering, siliceous, scaly slate or schist, with flaser structure and polymict fragments ranging in size from a few millimeters up to (in ME) several hundred meters. Considered a melange consisting of metasedimentary, felsic and mafic metavolcanic, and ultramafic rocks. Unit description from USGS GEOLEX website (ME078). W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith E - Feldspathic sandstone
Primary rock typesandstone
Secondary rock type
Other rock types
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > Metasandstone > Metagraywackemetaquartzwacke W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith E - Feldspathic sandstone
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.
USGS Geologic Names Lexicon (GEOLEX)
Geographic coverageSomerset

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