PROCEEDINGS 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



Vol. XI, No. 3, pp. 179-238 August 14, 1909* 



THE STRATIGRAPHIC RELATIONS AND PALEONTOL- 

 OGY OF THE "HELL CREEK BEDS," "CERATOPS 

 BEDS" AND EQUIVALENTS, AND THEIR REFERENCE 

 TO THE FORT UNION FORMATION.i 



By F. H. Knowlton. 



Contents. 



Introduction 180 



Problem and conclusion 180 



Historical summary 181 



Areal distribution and lithologic character of the Fort Union formation . . 182 



Division of the Fort Union into two members 183 



Areal distribution and paleontologic contents of the lower member of the 



Fort Union 184 



1. Hell Creek, Montana 184 



2. Miles City, Montana, and vicinity 186 



3. Forsyth, Montana 190 



4. Custer, Montana, and vicinity 192 



5. Bull Mountain, Montana, area 192 



6. Melville, Montana, area 192 



7. Red Lodge, Montana, area. 195 



8. Glendive, Montana, and vicinity 196 



*Author's separates of this paper were distributed June 25, 1909. 



^ Pubhshed with the permission of the Director of the U. S. Geological 

 Survey. 



This paper was read before the National Academy of Sciences on April 

 22, 1909, under the title; " Stratigraphic relations and Paleontology of the 

 lower member of the Fort Union Formation, " the title finally selected having 

 been decided upon too late for printing in the Programme of the Academy 

 meetings. 



Proc. Wash. Acad. Sci., August, rgog. 



