Albite-magnetite-studded gneiss

Gray or greenish-gray, albite- and magnetite-studded granulose biotite-quartz-plagioclase gneiss, containing chloritized biotite and garnet. Occurs as altered varieties of Y1,2bg near 1,150-Ma intrusive augen gneisses of the Chittenden Intrusive Suite (Y3Ama); in the Lincoln Mountain massif a dark-gray biotite-microcline-chlorite-spotted gneiss contains magnetite grains as much as 1 cm in diameter. Part of the altered rocks adjacent to the Chittenden Intrusive Suite. Mount Holly Complex paragneiss. Rocks of the Green Mountain and Lincoln Mountain massifs and eastern domes.
State Vermont
Name Albite-magnetite-studded gneiss
Geologic age Late Mesoproterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > ParagneissGray or greenish-gray, albite- and magnetite-studded granulose biotite-quartz-plagioclase gneiss, containing chloritized biotite and garnet.
References
NGMDB product
Counties Rutland