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Geologic Unit: Balls Falls
Map showing publication footprint
  • Usage in publication:
    • Ball's Falls Formation
  • Modifications:
    • First used
  • Dominant lithology:
    • Limestone
  • 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 Ball's Falls Formation (new), the Art Park Phosphate Beds (new), the Devil's 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 Ball's Falls interfingers with the laterally equivalent Devil's Hole. The Medina unconformably overlies Queenston Shale; unconformably underlies Clinton Group.

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


Map showing publication footprint
  • Usage in publication:
    • Balls Falls facies
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Brett, C.E., Tepper, D.H., Goodman, W.M., LoDuca, S.T., and Eckert, Bea-Yeh, 1995, Revised stratigraphy and correlations of the Niagaran Provincial Series (Medina, Clinton, and Lockport Groups) in the type area of western New York: U.S. Geological Survey Bulletin, 2086, 66 p., Prepared in cooperation with EPA and Univ. Rochester, Dept. Earth Environ. Sci


Summary:

The Balls Falls facies, informally named in Duke (1991) is considered an informal western facies of the Devils Hole Sandstone of the Medina Group in western NY pending further study. Consists of thin beds of dolomitic sandstone, fine-grained dolomite, and interbedded gray to red shale.

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


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

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