Amphibolite

Dark-grayish-green, fine-grained quartz-hornblende-plagioclase amphibolite, locally garnetiferous, and medium-grained hornblende-plagioclase amphibolite. Occurs with belts of calc-silicate rocks and as lenses within biotite-quartz-plagioclase paragneiss. Unit probably includes both meta-igneous and metasedimentary rocks intercalated throughout the Early and Middle Mesoproterozoic-age rocks of the Mount Holly Complex. Part of the aluminous schists and gneisses of the Washington Gneiss and Wilcox Formation and related rocks. Mount Holly Complex paragneiss. Rocks of the Green Mountain and Lincoln Mountain massifs and eastern domes.
State Vermont
Name Amphibolite
Geologic age Early Mesoproterozoic
Lithologic constituents
Major
Metamorphic > AmphiboliteDark-grayish-green, fine-grained quartz-hornblende-plagioclase amphibolite, locally garnetiferous, and medium-grained hornblende-plagioclase amphibolite.
Minor
Metamorphic > Metasedimentary > ParagneissBiotite-quartz-plagioclase paragneiss.
Metamorphic > Metasedimentary > Calc-silicate-rockOccurs with belts of calc-silicate rocks.
References
NGMDB product
Counties Bennington - Rutland - Windsor