Pegmatite dikes

Pinkish-gray to light-gray, unfoliated, magnetite-biotite (┬▒tourmaline) granite pegmatite, <1 m to 10 m thick. Crosscuts Ottawan foliation and locally fills narrow, northeast-trending, steeply dipping normal ductile shear zones. Intrusive rocks of the Adirondacks in Vermont and in the Whitehall, N.Y., area.
State Vermont
Name Pegmatite dikes
Geologic age Late Mesoproterozoic
Lithologic constituents
Major
Igneous > Plutonic > Granitic > Leucocratic-granitic > Pegmatite (Dike or sill)Pinkish-gray to light-gray, unfoliated, magnetite-biotite (┬▒tourmaline) granite pegmatite, <1 m to 10 m thick.
References
NGMDB product
Counties Rutland