Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 244,
The Relationship Between Geology and Landslide Hazards of Atchison, Kansas, and Vicinity--Fig. 4
Fig. 4. Upper part of the Oread Limestone and the lower part of the Kanwaka Shale, exposed in a quarry in the SW SW sec. 21, T. 6 S., R. 21 E.