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Devonian - Silurian Allagash Lake Formation mixed sedimentary rocks

Devonian - Silurian Allagash Lake Formation mixed sedimentary rocks
StateMaine
NameDevonian - Silurian Allagash Lake Formation mixed sedimentary rocks
Geologic ageDevonian - Silurian
Original map labelDSas
CommentsW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite Protolith S - Interbedded pelite, sandstone, and limestone and/or dolostone
Primary rock typemudstone
Secondary rock typesandstone
Other rock typeslimestone; dolostone (dolomite)
Lithologic constituents
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.
Forbes, W.H., pers. communication, in Pollock, 1983.
Geographic coveragePiscataquis

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