Butler Rock
Steven Dutch, Natural and Applied Sciences, University
of Wisconsin - Green Bay
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Butler Rock is a large ridge of Waupee Volcanics. The countryside lacks obvious landmarks and the ridge itself is not obvious from the nearest good roads. Also, numerous new tracks have been cut in the woods so old maps cannot be used to follow roads reliably. On these maps, green denotes swampy areas.
Best access is off County W. The best way to locate the rock is by careful map reading and mileage checking.
If approaching from the north, cross a low ridge (no outcrop) and proceed south about 500 meters (0.3 miles). The trail leading in is not conspicuous and possibly not safe for low vehicles. A rough track that was once passable with four wheel drive leads to the top.
Outcrop Views
 | Outcrop is widespread for several hundred meters along the length of the ridge. |
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Lithology
 | The rocks are layered and frequently show fragmental textures, reflecting volcaniclastic lithology rather than massive flows. Minor folds and flexures are common, although the overall strike of the rocks is easterly.. |
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| Below: fragmental metavolcanics. | |
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Views From The Top
 | Left and below: views looking south and west from the west end of the outcrops. |
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 | The west end of Butler rock has a large, steep, treeless face offering good views. These views are to the west. |
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West End of Butler Rock
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Left: looking off the west end of Butler Rock. Below: Views of the Waupee Volcanics. |
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 | Left and below: epidote mineralization is common on Butler Rock. On the west end of the rock, some of the more exposed corners show wind abrasion. |
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Created 23 August 2005, Last Update 23 Apr 2007
Not an official UW Green Bay site