Kansas is rich in sedimentary rocks and variations in their deposition can create many different and interesting types of structures. Two large displays in the southwest corner of the museum show a variety of these unique rock forms. Included are examples of cone-in-cone, ripple marks, boxwork, geodes, concretions, septaria, sand crystals, mud cracks, armored mud balls, rosettes, oolites, styolites and nodules. Pictured in the image below is an example of boxwork.