| State | Maine |
|---|---|
| Name | Silurian Smyrna Mills Formation |
| Geologic age | Silurian |
| Lithologic constituents | Major
Metamorphic > Metasedimentary > Metaclastic > Quartzite (Zeolitic (prehnite-pumpellyite))W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith Q - Interbedded pelite and sandstone
Sedimentary > Clastic > Siltstone (Bed)W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith Q - Interbedded pelite and sandstone
Metamorphic > Metasedimentary > Metaclastic > Slate (Zeolitic (prehnite-pumpellyite))W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith Q - Interbedded pelite and sandstone
|
| Comments | W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; GS - Greenschist facies; Protolith L - Calcareous quartz sandstone |
| 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.Pavlides, Louis and Berry, W.B.N., 1966, Graptolite-bearing Silurian rocks of the Houlton-Smyrna Mills area, Aroostook County, Maine, IN Geological Survey research 1966: U.S. Geological Survey Professional Paper, 550-B, p. B51-B61.https://pubs.er.usgs.gov/publication/pp550B US Geological Survey, 2005, National Geologic Map Database, Geologic Names Lexicon "GEOLEX", http://ngmdb.usgs.gov/Geolex/. |
| NGMDB product | |
| Counties | Aroostook |