|A cross-section through a high-spired snail, U.S. Route 10 roadcuts. Body fossils are pretty rare in the Prairie du Chien; the only forms I saw on this visit were a few snails, mostly high-spired like this one.
|This natural cast of a nautiloid was found by an eagle-eyed Junior Paleontologist on a fossil walk at Coldwater Spring. It comes from the Platteville Formation.
|I'm getting better at finding horn corals. Here's the pointed end of one in the upper Platteville near Coldwater.
|A shell bed in the upper Platteville in the area across from and south of the University of St. Thomas. This platform on the bluffs is dotted with brachiopods.
|In the bluffs east of the river a few blocks north of Fort Bridge, I have observed a fair number of chips of bifoliate bryozoans in the lowermost shaly part of the Decorah Shale (see below the penny for an example). To the north, in the area near the site of the shell bed photo above, I have observed ramose forms at about the same interval. Different local environments? (If, of course, the responsible beds are of the same age.)
|This is too darn cool. This is a conulariid in the upper Platteville (probably Magnolia Member), in situ, in the Shadow Falls area. I can't tell you how excited I was to find this!