BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 VOL. 8, PP. 227-240, PLS. 21-22 MARCH 8, 1897 



GYPSUM DEPOSITS OF KANSAS* 



BY G. P. GRIMSLEY 



(Presented before the Society December 81, 1896) 



CONTENTS 



Page 



Introduction and historical resume 227 



Location and divisions of the deposits 229 



Topography 229 



Northern area 229 



Central area 230 



Southern area 230 



Blue Rapids deposits 230 



Gypsum City deposits 231 



Secondary gypsum deposits 233 



General character of the material 233 



Discovery and extent of the areas 233 



Comparison with foreign material 234 



Microscopical character , 235 



Medicine Lodge deposits. 235 



Character of the gypsum .... 235 



Extent of the area 235 



Geological relations 236 



Solution effects '..... 236 



Origin, modification, and age of the deposits 237 



Northern area 237 



Central area 238 



Southern area 239 



Analyses of the gypsum 240 



Conclusions 240 



Introduction and historical Resume. 



In connection with the economic division of the University Geological 

 Survey of Kansas I spent the greater portion of the summer of 1896 in 

 the field investigation of the gypsum deposits in that state. In the fol- 



* Published with the permission of the Director of the University Geological Survey of Kansas. 

 XXXIII— Bull. Geol. Soc. Am., Vol. 8, 1896 (227) 



