Silurian Spragueville Formation (MESspr;0)

State	Maine
Name	Silurian Spragueville Formation
Geologic age	Silurian
Original map label	Sspr
Comments	W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite Protolith R - Interbedded pelite and limestone and/or dolostone
Primary rock type	mudstone
Secondary rock type	limestone
Other rock types	dolostone (dolomite)
Lithologic constituents	Major Sedimentary > Carbonate > Limestone (Bed)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite Protolith R - Interbedded pelite and limestone and/or dolostone Sedimentary > Clastic > Mudstone (Bed)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite Protolith R - Interbedded pelite and limestone and/or dolostone
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. Pavlides, L., 1966, Meduxnekeag Group and Spraugueville Formation of Aroostook County, northeast Maine, in Cohee, G.V., and West, W.S., Changes in stratigraphic nomenclature in the U.S. Geological Survey - 1965: U.S. Geological Survey Bull. 1244-A, p. 52-60. [http://pubs.er.usgs.gov/publication/b1244A] Pavlides, L., 1968, Stratigraphic and facies relationships of the Carys Mills Formation of Ordovician and Silurian age, northeast Maine: U.S. Geological Survey Bull. 1264, p. 44. [http://pubs.er.usgs.gov/publication/b1264]
Geographic coverage	Aroostook