Browse Items (1125 total)

Many dark xenoliths

Contains large phenocrysts and abundant dark xenoliths, from a ring dike

Large blocks of float in Big Brook

Green granite from quarry just west of redstone quarry

From a redstone quarry with massive red granites

Fine grained, low in quartz

from Conway granite

Intruded by osceola granite, associated with astrophyllite

Occurs in massive slabby outcrops

Coarse, with fayalite, ferrohedenbergite, ferrohastingsite

other minerals found include sillimanite, kyanite, and corundum