Silurian Ripogenus Formation (MESrp;0)

State	Maine
Name	Silurian Ripogenus Formation
Geologic age	Silurian
Original map label	Srp
Comments	W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite GS - Greenschist facies Protolith L - Calcareous quartz sandstone
Primary rock type	sandstone
Secondary rock type
Other rock types
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Calcareous)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite GS - Greenschist facies Protolith L - Calcareous quartz 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. [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. Boucot, A.J., Griscom, A., and Allingham, J.W., 1964, Geologic and aeromagnetic map of northern Maine: U.S. Geol. Surv., Map GP-312. Griscom, A., 1976, Bedrock geology of the Harrington Lake area, Maine: Ph.D. dissert., Harvard Univ., Cambridge, 373 p. Willard, B., 1945, Silurian fossils from Ripogenus dam, Maine: Jour. Paleontology, v. 19, p. 64-68.
Geographic coverage	Piscataquis