364 W. H. WEED — COAL FIELDS OF MONTANA. 



The Bozemau coals were placed provisionally in the Fort Pierre group by 

 Professor Pumpelly in his report upon the coals of Montana. 



Conclusion. 



While the evidence presented in this paper is not considered conclusive, 

 and while the work upon the district is not far enough advanced to warrant 

 a final statement, yet is believed that the facts show that the coal-measures 

 of the Cinnabar and Bozeman coal fields are probably of Laramie age, occur- 

 ring at the very base of the Laramie series ; and that they are conformably 

 overlain by a totally different series of rocks, composed entirely of volcanic 

 material and containing an abundant fossil flora of recognized Laramie types, 

 in turn overlain by beds of fresh-water clays and sandstones of undetermined 

 age, but belonging to what has heretofore been considered as undoubtedly 

 Laramie strata. 



