THE 



JOURNAL OF GEOLOGY 



JANUARY-FEBRUARY, 1S97 



COMPARISON OF THE CARBONIFEROUS AND PER- 

 MIAN FORMATIONS OF NEBRASKA AND KANSAS. 



INTRODUCTION. 



After having devoted three summers to the study of the 

 Upper Carboniferous and Permian formations of Kansas, the 

 writer recently reviewed quite rapidly the similar formations of 

 southeastern Nebraska, and in this paper will give an outline of 

 their general correlation. 



No particular formation was traced from Kansas into or 

 across Nebraska, nor were the stratigraphic details worked out 

 carefully in Nebraska; still the work done, limited as it was in 

 character, showed the geologic age and general relation of the 

 rocks of Kansas to those of Nebraska, and as various opinions 

 are entertained regarding these relations it seems important to 

 give a brief description of this work. 



NEMAHA COUNTY. 



Wabaunsee formation. — It is desirable to select the three 

 counties — Nemaha, Otoe, and Cass — in which the greater part 

 of the field work was done, for the general subdivisions of this 

 paper and then under each county to describe its geologic 

 formations, beginning with the oldest. 



The exposures in the eastern part of Nemaha county along 

 the Missouri River were very fully described by Meek,' sections 



'Final Rep. U. S. Geol. Sur. Nebraska and adjacent Territories, Pt. II, 

 Paleontology, pp. 109-1 14. 

 Vol.. v., No. I. I 



