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National Geologic Map Database
Geologic Unit: Jolley Cut
Map showing publication footprint
  • Usage in publication:
    • Jolley Cut Formation
  • Modifications:
    • First used
  • Dominant lithology:
    • Dolomite
  • AAPG geologic province:
    • Appalachian basin
Publication:

Duke, W.L., 1991, The Lower Silurian Medina Group in New York and Ontario, Part 4, IN Cheel, R.J., ed., Sedimentology and depositional environments of Silurian strata of the Niagara Escarpment, Ontario and New York; Trip B4: Geological Association of Canada Field Trip Guidebook, Joint annual meeting of Geological Association of Canada, Mineralogical Association of Canada, and Society of Economic Geologists, Toronto, ON, May 30-31, 1991, p. 35-61.


Summary:

The Medina Group comprises 11 facies, which can be organized into three facies associations. The previously defined color-based formations do not conform with lithic correlations except for the Whirlpool and Manitoulin. A formal major revision is being proposed by Brett and others (in press) and Duke and others (in press). The newly revised Medina Group will include the Whirlpool Sandstone at its base (virtually unchanged), the overlying Jolley Cut Formation (a tentative renaming of the Manitoulin), the Balls Falls Formation (new), the Art Park Phosphate Beds (new), the Devils Hole Formation (new), the Grimsby Formation (revised), the Power Glen Formation (revised), the Thorold Formation (revised), the Cambria Formation (new), and the Kodak Formation (resurrected). The Medina unconformably overlies Queenston Shale; unconformably underlies Clinton Group.

Source: GNU records (USGS DDS-6; Reston GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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