k6 ILLINOIS STATE GEOLOGICAL SURVEY CIRCULAR 500 



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 Geological Survey Bulletin 60, p. 271-281. 



Willman, H. B., 19^2, Stratigraphy of the exposed formations, in Willman, H. B. , and 



J. Norman, Geology and Mineral Resources of the Marseilles, Ottawa, and Streator 

 Quadrangles: Illinois State Geological Survey Bulletin 66, p. 71-180. 



Wood, J. M. , 1963, The Stanley cemetery flora (Early Pennsylvanian) of Greene County, 

 Indiana: Indiana Geological Survey Bulletin 29, 73 p. , 2 figs., h tables, 

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Worthen, A. H., and James Shaw, 1873, Geology of Rock Island County, in Worthen, A. H. , 

 Geology and Palaeontology: Geological Survey of Illinois, v. 5, p. 217-23*+. 



