| Altough not the original owners of the
Schoonmaker Quarry, the Schoonmakers owned and operated it longer than any
other family in Wauwatosa history. In 1862, the Schoonmaker Reef, located in
the quarry, was recognized as an ancient coral reef, the first identified in
the United States. The site is designated a National Historical Landmark in
Schoonmaker Reef, also known as Wauwatosa Reef, Schoonmaker Quarry, Raphu Station or Francey Reef is in Wauwatosa, Wisconsin. It is located North of W. State St., between N. 66th St. and N. 64th St. extended, in Wauwatosa.