Granodiorite to tonalite (NHOo2-3A;0)

State	New Hampshire
Name	Granodiorite to tonalite
Geologic age	Late Ordovician
Original map label	Oo2-3A
Comments	Part of the Oliverian Plutonic Suite (Late Ordovician) - Pink, weakly to moderately foliated, locally porphyritic biotite granitoids found in mantled gneiss domes. Mafic varieties contain hornblends. Variably metamorphosed up to amphibolite facies.
Primary rock type	granodiorite
Secondary rock type	tonalite
Other rock types
Lithologic constituents	Major Igneous > Plutonic > Granitic > Tonalite (Pluton)granodiorite to tonalite Igneous > Plutonic > Granitic > Granodiorite (Pluton)granodiorite to tonalite
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	Grafton - Sullivan