| State | New York |
|---|---|
| Name | Fordham Gneiss (B member) |
| Geologic age | Precambrian - Middle Proterozoic |
| Lithologic constituents | Major
Metamorphic > Amphibolite
Metamorphic > Gneissbiotite and/or hornblende-garnet-quartz-plagioclase gneiss
|
| Comments | Age change per USGS Lexicon website (ref. NY046). Unit is divided up into 6 units on printed map (f undivided, and fa - fe). Digital map also separates them out, but combines unit fd with unit fc due to unclear labeling on printed map? (hard to distinguish). |
| References | 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 | Westchester |