Silurian Reef at Wauwatosa, Wisconsin

The northeast corner of 68th and State Streets, Wauwatosa, was the site of a large quarry that contained a single Silurian reef 19 m thick and over 140 m in breadth. Once known as Schoonmaker's Quarry (shown here about 1900), this area is now filled and covered by urban development. Some of the rock outcrop in the upper right corner of the photo can be seen today.

© 1997, Milwaukee Public Museum, Inc.