Ascutney Mountain stock – hornfels

Dense, compact hornfels consisting of recognizable but altered schists of the country rock. Shown only around main Ascutney Mountain stock in structural continuity with rocks outside the contact aureole. Locally aluminous rocks of the Waits River Formation contain andalusite, sillimanite, cordierite, pleonaste, and corundum; calcareous pelites contain diopside, quartz-wollastonite, plagioclase, grossular garnet, and scapolite. Part of the White Mountain Igneous Suite; Ascutney Mountain stock; Ascutney Mountain igneous complex - Consists of two plutons, a partial ring dike, and screens of volcanic rocks. K-Ar ages of 122 to 120 Ma (Foland and Faul, 1977).
State Vermont
Name Ascutney Mountain stock – hornfels
Geologic age Early Cretaceous
Lithologic constituents
Major
Metamorphic > Granoblastic > Hornfels (Hornfels)Dense, compact hornfels consisting of recognizable but altered schists of the country rock.
References
NGMDB product
Counties Windsor