Augite-hornblende diorite and gabbro (NHK9AB;0)

State	New Hampshire
Name	Augite-hornblende diorite and gabbro
Geologic age	Cretaceous
Original map label	K9AB
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	diorite
Secondary rock type	gabbro
Other rock types
Lithologic constituents	Major Igneous > Plutonic > Gabbroic > Gabbro (Pluton)Augite-hornblende diorite and gabbro - Gray to black, coarse-grained, porphyritic. Igneous > Plutonic > Dioritic > Diorite (Pluton)Augite-hornblende diorite and gabbro - Gray to black, coarse-grained, porphyritic.
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. McHone, J.G., and Butler, J.R., 1984, Mesozoic igneous provinces of New England and the opening of the North Atlantic Ocean: Geological Society of America Bulletin, v. 95, p. 757-765.
Geographic coverage	Rockingham