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Silurian Ripogenus Formation

Silurian Ripogenus Formation
State Maine
Name Silurian Ripogenus Formation
Geologic age Silurian
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.
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.
Counties Piscataquis