Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > New York
|Name||Iberville Shale (in Vermont)|
|Geologic age||Middle Ordovician|
|Original map label||Oi|
|Comments||part of Lorraine, Trenton, and Black River Groups up to 1600 ft. (490 m). Secondary unit description from USGS Geologic Names lexicon (ref. NY046): Geographically extended the Iberville formation from southern Quebec, CAN into northwestern VT. Consists of noncalcareous shale, rhythmically interbedded with thin quartz-silty dolomite, uniform fine-grained dolomite, and in lower part, calcareous shale. Thickness is 1000 to 2000 feet. Overlies the Stony Point formation and underlies the Hathaway formation. The Iberville is of Middle Ordovician age.|
|Primary rock type||shale|
|Secondary rock type||dolostone (dolomite)|
|Other rock types|
Sedimentary > Clastic > Mudstone > Shalein lower part, calcareous shale
Sedimentary > Carbonate > Dolostonein lower part, calcareous shale
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.
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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