Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 241,
Allostratigraphic and Sedimentologic Applications of Trace Fossils to the Study of Incised Estuarine Valleys
Fig. 3. General view of the north wall at Buildex Quarry. Note the disconformable contact between the laterally continuous Tonganoxie Sandstone Member and the underlying Weston Shale Member. The Ottawa coal occurs between these two units.
Kansas Geological Survey
Web version March 19, 1998