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Geologic Unit: Medina

Publication:
Vanuxem, Lardner, 1840, Fourth annual report of the Geological 
   Survey of the third district: New York Geological Survey 
   Annual Report, no. 4, p. 355-383.
Usage in Publication:
Medina sandstone

Modifications: Geologic Province: Dominant Lithology:
 Named
 Appalachian basin
 Sandstone

Summary:
Unit called red sandstone of Oswego in former reports, here referred to as Medina sandstone. Predominant color is red, more rarely whitish and greenish. Confined to Oswego Co., to high grounds of Oneida at Florence village, and others parts of town of Florence, and to extreme northern parts of Onondaga and Cayuga Cos., NY. Occupies stratigraphic position between Oneida conglomerate above and Salmon River sandstone below.
Source: GNU records (USGS DDS-6; Reston GNULEX).


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.
Usage in Publication:
Medina Group

Modifications: Geologic Province: Dominant Lithology:
 Revised
 Appalachian basin
 

Summary:
The Medina Group composes 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 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).


Publication:
LoDuca, S.T., and Brett, C.E., 1994, Revised stratigraphic facies 
   relationships of the lower part of the Clinton Group (middle 
   Llandoverian) of western New York State, IN Landing, Ed, ed., 
   Studies in stratigraphy and paleontology in honor of Donald 
   W. Fisher: New York State Museum Bulletin, no. 481, p. 
   161-182.
Usage in Publication:
Medina Group

Modifications: Geologic Province: Dominant Lithology:
 Revised
 Appalachian basin
 

Summary:
Thorold Sandstone should not be included as the basal unit of the Clinton Group, as the Thorold is found below the Densmore Creek Bed (new) of the Neahga Shale, which marks the basal Clinton unconformity westward from Niagara Co., NY, to St. Catharines, Ontario. Eastward from Niagara Co., the units overlying the Thorold and underlying the Densmore Creek of the Neahga and Maplewood Shales or Webster Bed (new) of the Clinton Group include the 2.0- to 3.0-m-thick reddish, ostracode-bearing Cambria Shale and the 2.0- to 5.0-m-thick greenish to slightly reddish gray Kodak Sandstone. These three units are conformable with one another and therefore are included in the uppermost Medina Group.
Source: GNU records (USGS DDS-6; Reston GNULEX).


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 the U.S. Environmental Protection Agency and the University 
   of Rochester, Department of Earth and Environmental 
   Sciences.
Usage in Publication:
Medina Group*

Modifications: Geologic Province: Dominant Lithology:
 Revised
 Appalachian basin
 

Summary:
The Medina Group in NY is revised to include (ascending) the Whirlpool Sandstone, Power Glen Shale, Devils Hole Sandstone (new name), Grimsby Formation, Thorold Sandstone, Cambria Shale (new name), and Kodak Sandstone. The interval containing the Thorold, Cambria, and Kodak has previously been assigned to the overlying Clinton Group. The term Medina replaces the Albion Group used previously in NY. The Medina consists of 80 to 115 ft of white, green, red, barren to moderately fossiliferous sandstone, siltstone, and shale. Unconformably overlies the Ordovician Queenston Shale and unconformably underlies the Clinton Group. The upper contact of the Medina was formerly placed by Rickard (1975) at the top of the Grimsby Formation; it is here revised as the top of the Kodak Sandstone. The Medina is of Early Silurian (Llandoverian) age. [This report uses the Early and Late Silurian time scale of Harland and others (1982).]
Source: GNU records (USGS DDS-6; Reston GNULEX).