| State | Maine |
|---|---|
| Name | Devonian - Silurian Castine Formation |
| Geologic age | Devonian - Silurian |
| Lithologic constituents | Major
Igneous > Volcanic > Mafic-volcanicGS - Greenschist facies; Protolith E - Mafic to felsic volcanic rocks
Igneous > Volcanic > Felsic-volcanicGS - Greenschist facies; Protolith E - Mafic to felsic volcanic rocks
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| Comments | Bar Harbor Series of Shaler (1889) is here formally changed to Formation rank. Unit is 2000 ft of well-bedded siltstone, sandstone, and conglomerate. Basal conglomerate measures approximately 450 ft. Weathers tan-gray-lavender, rusty. Overlies unnamed greenstone and Ellsworth Schist. Age probably Middle Silurian. (ME024) Unit description from USGS GEOLEX website (ME078). GS - Greenschist facies; Protolith E - Feldspathic 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.Smith, G.O., Bastin, E.S. and Brown, C.W., 1907, Description of the Penobscot Bay quadrangle [Maine]: U.S. Geological Survey Geologic Atlas of the United States, Penobscot Bay folio, no. 149, 14 p.https://pubs.er.usgs.gov/publication/gf149 Stewart, D.B., and Tucker, R.G., 1998, Geology of northern Penobscot Bay, Maine: U.S. Geological Survey Miscellaneous Investigations Series Map, I-2551.https://pubs.er.usgs.gov/publication/i2551 Brookins, D.G., Berdan, J.M. and Stewart, D.B., 1973, Isotopic and paleontologic evidence for correlating three volcanic sequences in the Maine coastal volcanic belt: Geological Society of America Bulletin, v. 84, no. 5, p. 1619-1628.US Geological Survey, 2005, National Geologic Map Database, Geologic Names Lexicon "GEOLEX", http://ngmdb.usgs.gov/Geolex/. |
| NGMDB product | |
| Counties | Hancock - Knox |