Silurian - Ordovician Frontenac Formation

Silurian - Ordovician Frontenac Formation
State Maine
Name Silurian - Ordovician Frontenac Formation
Geologic age Silurian - Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > GraywackeW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; GS - Greenschist facies; Protolith Q - Interbedded pelite and sandstone
Metamorphic > Metasedimentary > Metaclastic > Slate (Zeolitic (prehnite-pumpellyite), Greenschist)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; GS - Greenschist facies; Protolith Q - Interbedded pelite and sandstone
Comments U - Unmetamorphosed
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.

Marvinney, R.G., 1994, Sedimentological aspects of the Frontenac, Ironbound Mountain, and Northeast Carry Formations near Seboomook Lake, Maine; B2, IN Hanson, L.S., ed., Guidebook to field trips in north-central Maine: New England Intercollegiate Geological Conference Guidebook, [86th] Annual Meeting, Millinocket, ME, September 23-25, 1994, p. 67-89.

US Geological Survey, 2005, National Geologic Map Database, Geologic Names Lexicon "GEOLEX", http://ngmdb.usgs.gov/Geolex/.

NGMDB product
Counties Oxford - Piscataquis - Somerset