The driftless area of Wisconsin and everywhere along the Mississippi is nice. Thanks for sharing.
Back in another professional life, I had the pleasure of exploring for diamonds in southwest Wisconsin. Spent about 2 months bombing around River Falls, Ellsworth, Plum City, Pepin, and Red Wing. Required background reading was the Precambrian through Paleozoic depositional and deformation history of Wisconsin. I never visited the Baraboo Range, but became familiar with its maroon iron-rich quartzite, the folding of that horizon into the Baraboo Syncline, and the subsequent deposition of flat-lying sandstones and carbonates over top of the deformed quartzite, forming a regional unconformity which is very well exposed at Devil's Lake SP.
Foy