Ordovician Pile Mountain Argillite

Ordovician Pile Mountain Argillite
State Maine
Name Ordovician Pile Mountain Argillite
Geologic age Ordovician
Lithologic constituents
Metamorphic > Metasedimentary > Metaclastic > Argillite (Zeolitic (prehnite-pumpellyite))W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith A - Pelite
Comments GS - Greenschist facies; E - Epidote-amphibolite facies; AA - Low rank amphibolite facies; Protolith E - Feldspathic sandstone

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., Field, M.T., Fletcher, R., Forbes, W.H., Naylor, R.S., and Pavlides, L., 1964, Reconnaissance bedrock geology of the Presque Isle quadrangle, Maine: Maine Geol. Surv., Bull. 15, 117 p.

NGMDB product
Counties Aroostook