Stonington Formation

The Stonington Formation is a geologic formation in Michigan. It preserves fossils dating back to the Ordovician period.

Stonington Formation
Stratigraphic range: Late Ordovician
Type	Formation
Unit of	Richmond Group (geology)
Sub-units	Ogontz Member and Bay de Noc Member
Underlies	Big Hill Formation
Overlies	Bill's Creek Shale
Location
Region	Michigan
Country	United States

See also

• Earth sciences portal
• Michigan portal
• Paleontology portal

• List of fossiliferous stratigraphic units in Michigan