Mineral Resources On-Line Spatial Data
|Name||Middlebury and Chazy Limestone, Undifferentiated Youngman and Carman Formations, Crown Point Member|
|Original map label||Omic|
|Comments||Part of Champlain and Vermont Valleys, Chazy Group Secondary unit description from USGS Geologic Names lexicon (ref. VT030): Revised the Crown Point to the Crown Point member of the Chazy limestone in VT. Consists of massive limestone with characteristic MACLURITES MAGNUS fossils. Overlies the Day Point member and underlies the Valcour member, both of the Chazy limestone. The Crown Point is of Middle Ordovician age.|
|Primary rock type||limestone|
|Secondary rock type|
|Other rock types|
Sedimentary > Carbonate > LimestoneMassive, characterized by abundant Maclurites magnus.
Nicholson, S.W., Dicken, C.L., Horton, J.D., Foose, M.P., Mueller, J.A.L., and Hon, Rudi, 2006, Preliminary integrated geologic map databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island, and Vermont: U.S. Geological Survey Open-File Report 2006-1272.
Doll, C.G., Cady, W.M., Thompson, J.B., Jr., and Billings, M.P., 1961, Centennial Geologic Map of Vermont: Vermont Geological Survey, Miscellaneous Map MISCMAP-01, scale 1:250,000.
|Geographic coverage||Addison - Chittenden - Grand Isle|
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