Alpena Limestone

Last updated
Alpena Formation
Stratigraphic range: Middle Devonian
Type Formation
Unit of Traverse Group
Sub-unitsFour Mile Dam Member and Newton Creek Member
Underlies Thunder Bay Limestone
Overlies Long Lake Limestone
Location
Region Michigan
Country United States

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

References