BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 33. PP. 255-272. PLS. 4-5 MARCH 31. 1922 



PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



SOME PROBLEMS CONNECTED WITH THE DAKOTA 



SANDSTONE ' 



PRESIDENTIAL ADDRESS BY TIMOTHY W. STANTON 



(Read before the Pale out ological Society December 29, 1921) 



CONTENTS 



Page 



Introduction 255 



Location, character, and fauna of the sections 255 



The typical exposures 255 



Nebraska sections 257 



Kansas sections 257 



Texas section 261 



Relationships of the fauna 262 



General discussion of the origin of the sections 263 



Wyoming and Colorado sections 265 



New Mexico sections 269 



Review and conclusion 270 



Introduction 



There are still problems connected with the Dakota sandstone, though 

 that formation was named and described 60 years ago and has been under 

 investigation by many geologists at frequent intervals ever since. Even 

 such simple questions as its stratigraphic limits and its areal extent have 

 not received answers of sufficient clearness to be generally accepted, and 

 its mode of origin is still a subject of discussion. 



Location, Character, and Fauna of the Sections 

 the typical exposures 



The typical exposures from which the formation took its name are in 

 the bluffs bordering the Missouri Eiver valley "back of the town of Da- 

 kota," a village in northeastern Nebraska about 6 miles south of Sioux 

 City, Iowa, but the outcrops which were early studied and from which 



1 -Manuscript received by the Secretary of tbe Society February 20, 1922. 

 Published by permission of the Director of the U. S. Geological Survey. 



(255) 



