Elizaville Formation

Shale, argillite, quartzite.
State New York
Name Elizaville Formation
Geologic age Cambrian - Ordovician
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > ShaleMainly light-gray but ranges from light greenish-gray to dark-gray approaching black.
Minor
Metamorphic > Metasedimentary > Metaclastic > QuartziteUpper part contains horizon with many bands of brown quartzite ranging from 3 inches to 12 inches in thickness, at intervals of 2 or 3 feet.
Metamorphic > Metasedimentary > Metaclastic > Argillite
Comments part of Eugeosynclinal (Allochthonous) Sequence up to 6000 ft.? (2000 m). Secondary unit description from USGS Geologic Names lexicon (ref. NY046): Elizaville shales. Mainly light-gray but ranges from light greenish-gray to dark-gray approaching black. Coarse shaly or fine silty texture with all variations from fine phyllitic shale to coarse siltstone. Upper part contains horizon with many bands of brown quartzite ranging from 3 inches to 12 inches in thickness, at intervals of 2 or 3 feet. Also contains banding consisting of thin layers of ferruginous and dolomitic material an inch or so apart, and characterized by fine irregular crumpling, with crenulations of amplitude about one-half inch; this crumpling is somewhat similar to that in Pine Plains dolomites. Thickness about 90 feet. Age is Late Cambrian and Early Ordovician(?).
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.

USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/

https://ngmdb.usgs.gov/Geolex/search

NGMDB product
Counties Columbia - Dutchess - Rensselaer