Tonalite, diorite, granodiorite, and granite (NHOh2-9A;0)

State	New Hampshire
Name	Tonalite, diorite, granodiorite, and granite
Geologic age	Late Ordovician
Original map label	Oh2-9A
Comments	Part of the Highlandcroft Plutonic Suite (Late Ordovician) - Pink to green rocks containing epidote, sericite, and chlorite. Found as stocks metamorphosed to greenschist facies and commonly sheared; coeval with Oliverian Plutonic Suite. Lost Nation pluton of Highlandcroft Plutonic Suite = 439+/-25 U/Pb per NH011; and 442+/-4 U/Pb per J.N. Aleinikoff, oral commun., June 30, 1988.
Primary rock type	tonalite
Secondary rock type	diorite
Other rock types	granodiorite; granite
Lithologic constituents	Minor Igneous > Plutonic > Granitic > Granodiorite (Pluton) Igneous > Plutonic > Dioritic > Diorite (Pluton) Igneous > Plutonic > Granitic > Tonalite (Pluton) Igneous > Plutonic > Granitic > Granite (Pluton)
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. Lyons, J.B., Aleinikoff, J.N., and Zartman, R.E., 1986, Uranium-thorium-lead ages of the Highland Plutonic Suite, New Hampshire: American Journal of Science, v. 286, p. 489-509.
Geographic coverage	Coos