Gabbro or norite to hornblende diorite

Rock complex with minor pyroxenite; Croton Falls and Peach Lake complexes in New York, and Mt. Prospect Complex in Connecticut.
State New York
Name Gabbro or norite to hornblende diorite
Geologic age Upper Ordovician
Lithologic constituents
Igneous > Plutonic > Gabbroic > Gabbro
Igneous > Plutonic > Gabbroic > Gabbro > Norite
Igneous > Plutonic > Dioritic > Dioritehornblende diorite
Igneous > Plutonic > Ultramafic > Pyroxenite
Comments part of Cortlandt and Smaller Mafic Complexes.

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 Putnam - Westchester