Waubakee Formation

The Waubakee Formation (also referred to as the Waubakee Limestone or Waubakee Dolostone) is a unit of marine sedimentary rock found in eastern North America. Named for distinctive outcrops along the banks of the Milwaukee River near the village of Waubeka, Wisconsin, in the United States.^[1][2] The unit is composed primarily of fine-grained dolomicrite that is finely laminated and conspicuously unfossiliferous. Owing to the lack of useful index fossils, its age is not well constrained, though most scientists consider it the youngest Silurian stratigraphic unit in Wisconsin.

Waubakee Formation
Stratigraphic range: Late Silurian PreꞒ Ꞓ O S D C P T J K Pg N
Drill core of the Waubakee Formation
Type	Geological formation
Underlies	Thiensville Formation
Overlies	Racine Formation
Thickness	18 to 33 meters (59 to 108 feet)
Lithology
Primary	dolomite
Location
Region	Eastern Wisconsin, at the boundary of the Wisconsin Arch and the Michigan Basin
Country	United States
Extent	Milwaukee, Ozaukee, and Sheboygan Counties, Wisconsin
Type section
Named for	Waubeka, Wisconsin
Named by	Alden (1906)