McKenzie Formation

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McKenzie Formation
Stratigraphic range: Silurian
Type Formation
Underlies Williamsport Formation
Overlies Rochester Shale
Region West Virginia
Country United States

The Silurian McKenzie Formation (Sm) is a mapped bedrock unit in Maryland.[1]


The McKenzie Formation is a Gray, thin-bedded shale and argillaceous limestone, with interbedded red sandstone and shale in its eastern extents in Maryland. The thickness ranges from 160 to 380 feet.[1]


Relative age dating of the Tuscarora places it in the Silurian period. It rests conformably atop the Clinton Group and conformably below the Bloomsburg Formation.[1]


  1. ^ a b c "Geologic Maps of Maryland:". Retrieved 2008-01-26.