Mineral Resources On-Line Spatial Data
|Name||Rhyolite and fine-grained granite|
|Original map label||K1a|
|Comments||Part of the New England-Quebec igneous province of McHone and Butler (1984). Overall, part of the White Mountain Plutonic-Volcanic Suite - Includes Cretaceous alkalic syenite to granitic to gabbroic plutons, minor volcanic rocks, and lamprophyre dikes of the New England-Quebec igneous province of McHone and Butler (1984); also includes Jurassic granite and syenite and less abundant quartz syenite, diorite, gabbro, nepheline syenite, and volcanic rocks of the White Mountain igneous province of McHone and Butler (1984).|
|Primary rock type||rhyolite|
|Secondary rock type||granite|
|Other rock types||ignimbrite; porphyry|
Igneous > Volcanic > Felsic-volcanic > Rhyolite
Igneous > Plutonic > Granitic > Granite
Igneous > Volcanic (Pyroclastic)includes some ignimbritic caldera-fill and minor intrusive rocks
Igneous > Plutonicminor intrusive rocks; also some aphanitic gray, black, or tan quartz-feldspar porphyry.
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.
|Counties||Belknap - Carroll - Strafford|
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