Located just north of Rock Springs between Baraboo and Reedsburg, this natural phenomenon has been a destination for geologists and students for more than a century. It’s located in the middle of an area known as Ableman’s Gorge, one of only two openings in the Baraboo Range. The Baraboo Range is a monadnock(a residual hill that consists of hard rock in an otherwise eroded area) located in Columbia and Sauk Counties, Wisconsin. This range of mountains is subterranean with only the peaks appearing above ground. The range consists of highly eroded Precambrian metamorphic rock, about 25 miles(40 km) long and varies from 5 to 10 miles(16 km) in width. The Wisconsin River, previously traveling in a north to south direction, turns to the east just north of the range before making its turn to the west towards the Upper Mississippi River. The eastern end of the range was glaciated during the Wisconsinian glaciation, while the western half was not, and consequently, marks the eastern boundary of Wisconsin’s Driftless Area. There are only two openings in the Baraboo Range, in the east, where the Baraboo River exits the basin and in Ableman’s Gorge, where the Baraboo River enters the basin. It is at this point where Van Hise Rock was pushed around, and upward, by geological forces. I can’t even pretend to really understand it all(I’m not a geologist nor do I play one on TV) but I can see that what is usually a horizontal layering of rock is vertical in the Van Hise monolith. The result is that professionals and students from all over the world visit this monolith to see, and research, this unique example of earth forces over the millennia. And it’s right here, on Wisconsin Highway 135, where anyone can stop and admire this geological marvel. PS — If you’re a geologist and think I’ve mis-reported anything here, please send me a message and we’ll see what we can do to fix it. :)
