Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > New Hampshire
|Name||Metavolcanic and metasedimentary rocks of the lower part of Ammonoosuc Volcanics, undivided|
|Geologic age||Middle Ordovician|
|Original map label||Oal|
|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.|
|Primary rock type||metavolcanic rock|
|Secondary rock type||metasedimentary rock|
|Other rock types|
Metamorphic > Metaigneous > Metavolcanic
Metamorphic > Metasedimentary
Bennett, D. S, , Wittkop, C.A., and Dicken, C.L., 2006 , Bedrock Geologic Map of New Hampshire - A Digital Representation of the Lyons and others 1997 map and ancillary files: U.S. Geological Survey Data Series 215, scale 1:250,000, CD-ROM.
Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock Geologic Map of New Hampshire: Reston, VA, U.S. Geological Survey Special Map, 1:250,000, 2 sheets.
|Geographic coverage||Coos - Grafton - Sullivan|
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