Clough Quartzite

Orthoquartzite, quartz metaconglomerate, muscovite schist, minor polymictic metaconglomerate. Disconformable below Fitch Formation and unconformable on Ordovician formations. Equivalent, in part, to member C of Rangeley Formation of Maine. Fossiliferous.
State New Hampshire
Name Clough Quartzite
Geologic age Lower Silurian (upper Llandoverian)
Lithologic constituents
Metamorphic > Metasedimentary > Metaclastic > Metaconglomeratequartz metaconglomerate; minor polymictic metaconglomerate
Metamorphic > Metasedimentary > Metaclastic > Quartziteorthoquartzite
Metamorphic > Schist > Mica-schist > Muscovite-schist
Comments Part of the Central Maine Composite Terrane (Central Maine Trough) - Variably metamorphosed sedimentary and volcanic rocks of greenschist to granulite facies, locally migmatized. Area includes structural belts between the Monroe fault on the west and the Campbell Hill fault on the east; that is, the Bronson Hill anticlinorium, Piedmont allochthon, Kearsarge-central Maine synclinorium, central New Hampshire anticlinorium, and Rochester-Lebanon (Maine) antiformal synclinorium.
NGMDB product
Counties Cheshire - Grafton - Sullivan