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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • McKenzie formation*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Shale
  • AAPG geologic province:
    • Appalachian basin
Publication:

Ulrich, E.O., 1911, Revision of the Paleozoic systems: Geological Society of America Bulletin, v. 22, p. 281-680.


Summary:

Named McKenzie formation for McKenzie Station on the Baltimore and Ohio Railroad, Alleghany Co., MD. Unit is basal formation of Cayugan series in PA, MD, and VA. It unconformably underlies Bloomsburg sandstone and unconformably overlies Clinton group. The Kiefer [Keefer] sandstone is found to pass into the McKenzie and is therefore considered the basal member of the McKenzie formation. The McKenzie is of Silurian age.

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


Map showing publication footprint
  • Usage in publication:
    • McKenzie Formation*
  • Modifications:
    • Biostratigraphic dating
  • AAPG geologic province:
    • Appalachian basin

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

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).