SECTIONS AT BOWERS MINE AND MOUNT EVARTS. 357 



Number 



Thickness 



of bed. 



in feet 





8 



3 



Sandstone. 



7 



8 



Coal and slate. 



6 



3 



Sandstone, very fissile and soft. 



5 



10 



Sandstone, hard and firm. 



4 



U 



Coal. 



3 



3 



Shale. 



2 



18 



Sand rock. 



1 



2 



Coal. 



Intrusive andesitic rock. 



From this place southward to the park boundary the bluff on the eastern 

 side of the river is formed of the coal-bearing sandstones, the seams having 

 been prospected at a few points but not worked. 



The Mount Evarts coals have been worked but the single entry is now 

 abandoned. This part of the field is not, however, available for mining, as 

 it lies within the boundaries of the Yellowstone National Park. 



The following section shows the number of seams found here : 



Mount Evarts Section of Coal-hearing Strata. 



Number 



Thickness 



of bed. 



in feet. 





23 





Shelly sandstones, cubical fracture. 



22 



100 



Very massive sandrock. 



21 



10 



Shales, bituminous and dark. 



20 



2 



Sandrock. 



19 



2 



Shales, bituminous, baked. 



18 



7 



Baked sandstones. 

 Basalt intrusion. 



17 



2 



Coaly shale. 



16 



100 



Sandstones, like number 14. 



15 



3 



Coal. 



14 



90 



Sandstones, in ledges from 2 to 5 feet thick, alternating 

 with shaly beds. 



13 



5 



Coal. 



12 



15 



Sandrock. 



11 



5 



Sandy limestone. 



10 



8 



Sandstones, dipping 25° eastward. 



9 



1 



Coal seam ; small. 



8 



10 



Sandrock. 



7 



5 



Coal and shale. 



6 



30 



Sandrock. 



5 



10 



Sandrock, massive ; rounded outcrop. 



4 



5 



Coal and shale. 



3 



5 



Sandrock. 



2 



25 



Shaly beds, with two coal seams. 



1 



5 



Tunnel and coal outcrop. 



Gray shaly series, corresponding to those under the 

 coal-measure sandstones of the Cinnabar section. 



l.III— Bull. Geol. Soc. Am., Vol. 2, 1890. 



