Hybrid rock: mangeritic to charnockitic gneiss

With xenocrysts of calcic andesine and, locally, xenoliths of anorthosite; with increasing percentage of anorthosite component, passes gradationally into anorthositic rocks.
State New York
Name Hybrid rock: mangeritic to charnockitic gneiss
Geologic age Middle Proterozoic
Lithologic constituents
Metamorphic > Gneissmangeritic to charnockitic gneiss
Igneous > Plutonic > Anorthositexenoliths of anorthosite passing into anorthositic rocks

Fisher, D.W., Isachsen, Y.W., and Rickard, L.V., 1970, Geologic Map of New York State, consisting of 5 sheets: Niagara, Finger Lakes, Hudson-Mohawk, Adirondack, and Lower Hudson, New York State Museum and Science Service, Map and Chart Series No. 15, scale 1:250,000.

NGMDB product
Counties Clinton - Essex - Hamilton - Warren - Washington