128 



KANSAS ACADEMY OF SCIENCE, 



N. 



Fig. 3. 

 No. 9 represents the horizon at which limestone (No. 9, figs. 1 and 2) should appear. No. 9' 

 represents the upper surface of the dark blue shales, which first make their appearance in the 

 vicinity of limestone No. 9. No. 14 is a well twenty-two feet deep which did not reach the blue 

 shale. No. 15 is the pond where fossil plants were found. 



Figure 3 represents a north-and-south section, measured for a quar- 

 ter of a mile north of the well shown at 13 (Fig. 2.) At 9 is shown 

 the horizon at which the blue shale should be first met with, while at 

 9^ is shown its upper surface as it actually exists. At 14 is shown the 

 well which was dug through till and sandstone, in which the blue 

 shale was not reached. At 15 is the pond in the bottom of which 

 plant remains were found. 



It was at first thought that the Americus limestohe, as shown in 

 Mr. Alva J. Smith's geological section across Lyon county, shown in 

 the last volume of the Transactions of the Academy existed here, but 

 a careful comparison of our section with Mr. Smith's of the strata 

 immediately underlying the Cottonwood Falls limestone shows tjie 

 two to be nearly identical, the differences consisting of greater thick- 

 ness of the limestones in Lyon county, with the exception of our No. 

 9 (fig. 1), which is exactly the same thickness as the corresponding 

 limestone in Lyon county, this being the second limestone below the 

 Cottonwood Falls limestone in Mr. Smith's section, and the lesser de- 

 velopment of the shales in that county. Mr. Smith's section does not 

 show the seam of coal occurring at the bottom of our section, but the 

 stone corresponding to the one just overlying our seam of coal is 

 shown in an eight-inch seam in his section. 



Acknowledgments are due to Dr. David White, of the National 

 Museum, for the determination of the plants in this list, and to Dr, 

 Geo. I. Adams, of the United States Geological Survey, and Mr. Alva 

 J. Smith, of Emporia, for assistance in locating the strata of our sec- 

 tion. 



