| State | Maine |
|---|---|
| Name | Ordovician Lobster Mountain volcanic complex |
| Geologic age | Ordovician |
| Lithologic constituents | Major
Sedimentary > Clastic > ConglomerateW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; GS - Greenschist facies; Protolith W - Mafic to felsic volcanic rocks
Igneous > Volcanic > Felsic-volcanic (Pyroclastic-tuff)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; GS - Greenschist facies; Protolith W - Mafic to felsic volcanic rocks
|
| Comments | W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith U - Andesitic volcanic rocks |
| 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., 1961, Stratigraphy of the Moose River synclinorium, IN Contributions to general geology, 1959: U.S. Geological Survey Bulletin, 1111-E, p. E153-E188.https://pubs.er.usgs.gov/publication/b1111E Neuman, R.B., 1973, Late Ordovician (Ashgillian) age of volcanic rocks, north-central Maine, IN U.S. Geological Survey research 1973: U.S. Geological Survey Professional Paper, 850, p. 165.https://pubs.er.usgs.gov/publication/pp850 US Geological Survey, 2005, National Geologic Map Database, Geologic Names Lexicon "GEOLEX", http://ngmdb.usgs.gov/Geolex/. |
| NGMDB product | |
| Counties | Piscataquis - Somerset |