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Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 241, part 1
Allostratigraphic and Sedimentologic Applications of Trace Fossils to the Study of Incised Estuarine Valleys

Fig. 2. Stratigraphy of the Douglas Group (after Archer, Lanier et al., 1994). Two valley-fill sequences (Tonganoxie and Ireland) are illustrated.

Kansas Geological Survey
Web version March 19, 1998