Trenton Group

Trenton Formation
Stratigraphic range: Middle-Upper Ordovician
Trenton Formation in Canada
TypeFormation
Sub-units
  • Dolgeville Limestone
  • Flat Creek Member
  • Kings Falls Limestone
  • Glens Falls Limestone
  • Sugar River Limestone
  • Denley Limestone
  • Steuben Limestone
UnderliesCollingwood Shale, Point Pleasant Formation & Scales Shale
OverliesBlack River & Plattin Formation
Lithology
PrimaryLimestone
OtherChert
Location
RegionIndiana, Michigan, Ohio, and Virginia
CountryUnited States, Canada
ExtentAppalachia, Midwestern and Southeastern United States

The Trenton Group is a geologic unit in Canada and Michigan, Ohio, New York State and Indiana, Pennsylvania, and West Virginia in the United States. It dates back to the Ordovician period.

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