Geology
- The Late Silurian Waubaukee Formation of Milwaukee and Ozaukee Counties, Wisconsin
- The Waubakee Formation, the youngest Silurian unit in Wisconsin, ranges from 20 to 30 m thick and consists of dolomite of intertidal to supratidal origin. In the Milwaukee subsurface, the Waubakee conformably overlies the Wenlockian Racine Formation across a 50 cm stratigraphic interval in which bioturbation declines and fossils dissappear; it is probably Late Wenlockian to Ludlovian age.