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 A single reef, 20 m thick and about 120 m in breadth, is located on the
Veterans Administration grounds adjacent to Milwaukee County Stadium. This natural exposure has been designated as a national geologic landmark by the U.S. National Park Service. Made in the 1920s, this photo shows a boy climbing the outcrop at the lower right.
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View of the reef from the parking lot of County Stadium; note massive nature of reef. Very few fossils have been found in this outcrop.
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Cross-section of the reef, based on drillhole and geophysical data. Note that most of the reef is buried beneath soil and other sediment.
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The only known fossil (trilobite) from the reef outcrop at County Stadium deposited in a museum collection.
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