Phyllite Outcrop

This outcrop of phyllite is by a roadside parking area on route I-91 southbound, north of exit 6 between Springfield and Rockingham, Vermont. It is a pelitic phyllite of the Gile Mountain Formation, of late Early Devonian age (approx. 400 million years old). Gile Mountain, the type locality, is farther north in Vermont just across the Connecticut River from Hanover, New Hampshire.