The northern paragneiss zone contains lenses of various lithologies, such as calcareous schists, amphibolite, eclogite, peridotite (mostly thoroughly serpentinized) and gabbro.
The geology of the Hazen's Notch area in Westfield and Montgomery is primarily Hazen's Notch Formation of schist with intrusions of Belvidere Mountain Amphibolite and two areas of ultramafic rocks all of which grades into Jay Peak Formation in the lower elevations.
In this case, data of U–Pb SHRIMP of Zircons from amphibolite facies gneisses from Kobaladurga and Kober single zircon evaporation ages of grey gneisses have been considered
The geology of the Planet area is ancient, estimated to be Precambrian, the bedrock being made up mostly of pinkish gneiss and absorbed limestone and amphibolite, which contained hematite-copper.
crustal thickening occurred that was associated with accretion of an intra-oceanic arc terrane and subsequent regional metamorphic activity characterized by the growth of retrograde, upper amphibolite-facies assemblages that define a clockwise, decompressive P–T path (pressure-temperature) path.