Ironbound Mountain Formation, Metarhyolite and microgranite intrusions (NHDir;0)

State	New Hampshire
Name	Ironbound Mountain Formation, Metarhyolite and microgranite intrusions
Geologic age	Lower Devonian
Original map label	Dir
Comments	Part of the Grenville Terrane (Connecticut Valley Trough).
Primary rock type	meta-rhyolite
Secondary rock type	granite
Other rock types
Lithologic constituents	Major Metamorphic > Metaigneous > Metavolcanic > Metarhyolitemetarhyolite Minor Igneous > Plutonic > Granitic > Granitemicrogranite intrusions
Map references	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. [http://pubs.er.usgs.gov/publication/ds215]
Unit references	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