Waubakee Formation

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Waubakee Formation
Stratigraphic range: Late Silurian
Type Geological formation
UnderliesThiensville Formation
Overlies Racine Formation
Thickness18 to 33 meters (59 to 108 feet)
Primary dolomite
RegionEastern Wisconsin, at the boundary of the Wisconsin Arch and the Michigan Basin
CountryUnited States
ExtentMilwaukee, Ozaukee, and Sheboygan Counties, Wisconsin
Type section
Named for Waubeka, Wisconsin
Named byAlden (1906)

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.

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  1. Alden, W. C. (1906). "Description of the Milwaukee Quadrangle, Wisconsin". U. S. Geological Survey Atlas, Milwaukee Folio. 140: 1–12.
  2. Rovey, C. W. (1997). "Proposed Reference Sections and Correlation of Upper Silurian and Devonian Strata, Eastern Wisconsin" (PDF). Geoscience Wisconsin. 16: 37–46.