|Geologic age||Upper Ordovician|
Sedimentary > Clastic > Mudstone > Shalered shale
|Comments||part of the Medina Group and Queenston Formation 800 ft. (250 m). Age change USGS Lexicon website (ref. NY046) according to reference NY019. In cross section E-E', in the subsurface of central to eastern OH, Queenston Shale is used for silty red shale equivalent to the Juniata Formation in WV. Age is Late Ordovician (Richmondian) based on stratigraphic position and fossils in equivalent strata in OH and KY (Ryder, 1992).|
Fisher, D.W., Isachsen, Y.W., and Rickard, L.V., 1970, Geologic Map of New York State, consisting of 5 sheets: Niagara, Finger Lakes, Hudson-Mohawk, Adirondack, and Lower Hudson, New York State Museum and Science Service, Map and Chart Series No. 15, scale 1:250,000.
Ryder, R.T., 1992, Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian basin from Morrow County, Ohio, to Pendleton County, West Virginia, IN Evolution of sedimentary basins; Appalachian basin: U.S. Geological Survey Bulletin, 1839-G, p. G1-G25.
USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/
|Counties||Monroe - Niagara - Orleans - Wayne|