Ordovician gabbro/diorite/ultramafic rocks (MEO9;0)

State	Maine
Name	Ordovician gabbro/diorite/ultramafic rocks
Geologic age	Ordovician
Original map label	O9
Comments	U - Unmetamorphosed
Primary rock type	gabbro
Secondary rock type	diorite
Other rock types	ultramafic intrusive rock
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. [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. Faul, H., Stern, T.W., Thomas, H.H., and Elmore, P.L.D., 1963, Ages of intrusion and metamorphism in the northern Appalachians: Am. Jour. Sci., v. 261, 9. 1-19.
Geographic coverage	Aroostook - Oxford - Penobscot - Piscataquis