Willoughby pluton - western zone

Light-gray to pink, medium- to very coarse grained, massive, miarolitic garnet-muscovite peraluminous leucogranite. Biotitic granodioritic western zone. Rb/Sr whole-rock age of 376±9 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 Willoughby pluton - western zone
Geologic age Devonian
Lithologic constituents
Igneous > Plutonic > Granitic > Granodiorite (Pluton)Biotitic granodioritic western zone.
NGMDB product
Counties Caledonia - Orleans