Rawsonville trondhjemite gneiss

Chalky-white to light-gray-weathering, medium- to coarse-grained biotite metatrondhjemite and aplite (Y1rta). Dated sample with U-Pb zircon SHRIMP age of 1,367±16 Ma, no. 3 (Ratcliffe and others, 1991; Aleinikoff and others, 2011) from crest of Bromley Mountain; U-Pb zircon age of 1,348±3 Ma, no. 6 (Ratcliffe and others, 1991). South Londonderry Igneous Suite (Middle and Early Mesoproterozoic) (1,393±9 Ma to 1,309±6 Ma). Mount Holly Complex intrusive rocks. Rocks of the Green Mountain and Lincoln Mountain massifs and eastern domes.
State Vermont
Name Rawsonville trondhjemite gneiss
Geologic age Early Mesoproterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > ParagneissChalky-white to light-gray-weathering, medium- to coarse-grained biotite metatrondhjemite.
References
NGMDB product
Counties Bennington - Rutland - Windham - Windsor