Steven Dutch, Natural and Applied Sciences, University
of Wisconsin - Green Bay
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The map above shows the principal Precambrian outcrops in south-central Wisconsin, the so-called "Baraboo Interval" (1700 Ma) granite-rhyolite terrane. Towns without outcrops are yellow, rhyolite localities are purple, granite localities are green. The Glovers Bluff impact structure is also in the map area and is light blue.
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NW 1/4 SW 1/4 Sec 9, T15N R10 E, on State Route 23 in Montello, Marquette County A former granite quarry turned into an attractive park. The rock is a fine-grained uniform pink granite of the 1700 m.y. rhyolite-granite terrain. |
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Close-up of the granite |
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View of the granite in outcrop |
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Left and below: the park |
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Created 20 September 2000, Last Update 20 September 2000
Not an official UW Green Bay site