52 C. S. PROSSER— PERMO-CARBONIFEROUS AND PERMIAN ROCKS. 



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Top of Lower Permian. 



Various colored shales, alternat- 

 ing with limestones containing 

 fossils. 



No. 40. First eherty limestone. 



Shales and magnesian limestones. 



Second eherty limestone, contain- 

 ing much chert. 



Various colored shales, alternating 

 with magnesian limestones. 



No. 52. Fort Riley limestone -buff 

 magnesian loek, with fossils. 



No. 53. Blue and brown shales. 



Third eherty limestone— light buff 

 and magnesian, with fossils. 



Shales and limestones. 



Fourth eherty limestone. 



Blue, drab and brown shales. 



Fifth eherty limestone, with fossils. 



No. 63. Shales with fossils. 



Shales and limestones. 



No. 66. Magnesian limestone, with 

 Monotis. 





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