Name used to refer to eastwardly thinning wedge of dolomite carrying Guelph fauna in Niagara Gorge. Name replaces preoccupied Lower Shelby of Clarke (1903). Underlies Oakfield limestone and overlies Eramosa dolomite. Age is Lockportian [late Niagaran, mid Wenlock-early Ludlow].
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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