Derby pluton - granodiorite

Rim zone of granodiorite of unit Ddbg. Rb/Sr whole-rock isochron age of 370±17 Ma (Ayuso and Arth, 1992). Igneous rocks of the Northeast Kingdom batholith of Ayuso and Arth (1992). Part of the New Hampshire Plutonic Suite.
State Vermont
Name Derby pluton - granodiorite
Geologic age Devonian
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Granodiorite
References
NGMDB product
Counties Orleans