Devonian Beck Pond Limestone (MEDb;0)

State	Maine
Name	Devonian Beck Pond Limestone
Geologic age	Devonian
Lithologic constituents	Major Sedimentary > Carbonate > LimestoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone Minor Sedimentary > Carbonate > DolostoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone Incidental Sedimentary > Clastic > SandstoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone Sedimentary > Clastic > MudstoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone
Comments	Named for exposures near Gonic, Strafford Co., southeastern NH. Consists of whitish or light-gray to dark-gray, thin-bedded, fine-grained arenaceous (graywacke) and argillaceous materials metamorphosed to schist and phyllite. Includes mica schist and phyllite and interbedded fine- to medium-grained micaceous graywacke schists in beds up to 2 ft thick; light- and dark-gray, fine-grained phyllites abundantly studded with dark staurolite crystals; and minor coarse muscovite schist composed almost wholly of mica and very thin quartz laminae. Argillaceous materials predominate, but graywacke is also prominent. Thickness is unknown. Probably underlies Rindgemere formation. (ME036) Unit description from USGS GEOLEX website (ME078). GS - Greenschist facies; E - Epidote-amphibolite facies; Protolith A - Pelite.
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 Moench, R.H., Boone, G.M., Bothner, W.A., Boudette, E.L., Hatch, N.L., Jr., Hussey, A.M., III, Marvinney, R.G. and Aleinikoff, J.N., 1995, Geologic map of the Sherbrooke-Lewiston area, Maine, New Hampshire, and Vermont, United States, and Quebec, Canada: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1898-D, 56 p., 2 sheets, scale 1:250,000, Prepared in cooperation with the Maine Geological Survey and the New Hampshire Geological Survey. https://pubs.er.usgs.gov/publication/i1898D Boucot, A.J., 1969, Geology of the Moose River and Roach River synclinoria, northwestern Maine: Maine Geol. Surv., Bull. 21, 123 p.
NGMDB product	NGMDB product page for 16547
Counties	Somerset

State

Name

Devonian Beck Pond Limestone

Geologic age

Devonian

Lithologic constituents

Major

Sedimentary > Carbonate > LimestoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone

Minor

Sedimentary > Carbonate > DolostoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone

Incidental

Sedimentary > Clastic > SandstoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone

Sedimentary > Clastic > MudstoneGS - Greenschist facies; Protolith S - interbedded pelite, sandstone, and limestone and/or dolostone

Comments

Named for exposures near Gonic, Strafford Co., southeastern NH. Consists of whitish or light-gray to dark-gray, thin-bedded, fine-grained arenaceous (graywacke) and argillaceous materials metamorphosed to schist and phyllite. Includes mica schist and phyllite and interbedded fine- to medium-grained micaceous graywacke schists in beds up to 2 ft thick; light- and dark-gray, fine-grained phyllites abundantly studded with dark staurolite crystals; and minor coarse muscovite schist composed almost wholly of mica and very thin quartz laminae. Argillaceous materials predominate, but graywacke is also prominent. Thickness is unknown. Probably underlies Rindgemere formation. (ME036) Unit description from USGS GEOLEX website (ME078). GS - Greenschist facies; E - Epidote-amphibolite facies; Protolith A - Pelite.

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

Moench, R.H., Boone, G.M., Bothner, W.A., Boudette, E.L., Hatch, N.L., Jr., Hussey, A.M., III, Marvinney, R.G. and Aleinikoff, J.N., 1995, Geologic map of the Sherbrooke-Lewiston area, Maine, New Hampshire, and Vermont, United States, and Quebec, Canada: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1898-D, 56 p., 2 sheets, scale 1:250,000, Prepared in cooperation with the Maine Geological Survey and the New Hampshire Geological Survey.

https://pubs.er.usgs.gov/publication/i1898D

Boucot, A.J., 1969, Geology of the Moose River and Roach River synclinoria, northwestern Maine: Maine Geol. Surv., Bull. 21, 123 p.

NGMDB product

NGMDB product page for 16547

Counties

Somerset