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Mineral Resources On-Line Spatial Data

Copake and Rochdale Formations

Copake and Rochdale Formations - Copake Formation-limestone, dolostone, siltstone; Rochdale Formation-limestone, dolostone; Halcyon Lake Dolostone-locally cherty.
StateNew York
NameCopake and Rochdale Formations
Geologic ageLower Ordovician
Original map labelOw
Commentspart of Wappinger and Stockbridge Groups, Poughquag Quartzite, and Metamorphic Equivalents up to 4000 ft. (1200 m).
Primary rock typelimestone
Secondary rock typedolostone (dolomite)
Other rock typessiltstone; chert
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Clastic > SiltstoneCopake Formation
Sedimentary > Carbonate > Dolostone
Incidental
Sedimentary > Chemical > ChertHalcyon Lake Dolostone-locally cherty.
Map references
NYS Museum, NYS Geological Survey, NYS Museum Technology Center, 1999, 1:250,000 Bedrock geology of NYS, data is distributed in ARC/INFOr EXPORT format (with ".e00" extension) in 5 seperate files based on printed map sheets, http://www.nysm.nysed.gov/gis.html.
Unit references
D. W. Fisher; Y. W. Isachsen, L. V. Rickard, 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 1:250000.

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