424 THE CANADIAN NATURALIST. [YoL X. 



only in the river valley or in the larger coulees which flow into 

 them that the Cretaceous rocks can be seen. The Belly Valley 

 in this part of its course is about 300 feet deep, and averages 

 nearly a mile in width. It therefore cuts about 200 feet into the 

 Cretaceous rocks, and displays fine sections of these. There are 

 in tills vicinity several associated coal seams ; one of these, that 

 which has been opened by Mr. Sheran, I may, for the s.ik(; of 

 clearness, refer to as the " main coal."' It is more or less per- 

 fectly exposed at intervals along this part of the Belly for a dist- 

 ance of about twelve miles, or from the workinu' at Coal Banks 

 to Big Island of the map. xVbove the Coal Banks the measures 

 are affected by a light anticlinal swell which brings up older 

 rocks, and the outcrop runs round by the west, appearing on the 

 river again at the mouth of the St. Mary. At the furthest point 

 up the St. Mary, where the coal appears (almost ^even miles 

 from the mouth of the river), it shows tiie following sections, the 

 tecoud column being a continuation of the first at a spot about 

 100 yards further down stream : — 



ft. in. 



Rusty ironstone layer 8 



Blackish and rusty shale. . . 5 



Coal U ?, 



Blackish shale 6 (» 



Coal 6 



Soil carbonaceous shale 4 



Coal 8 



Soft, thin shale, highly car- 

 bonaceous in upper part 



Ironstone shale <> 



Blackish shale 3 ft. in. 



Coal 8 Coal 1 



Carbonaceous shale (some coal) 1 6 Shaly coal 6 



Coal (partly below water ... 1 G Coal 1 3 



Shale 2 



Coal 9 



• Grrev shale 4 



Coal 1 4 



Grey shale (to water) .... 4 



About two miles further down the St. Mary the coals are 

 again seen, with the following development; — 



Coal (rather shaly) I 



Coal ., 1 f) 



Shale 3 



Coal It 



Shale 10 1 



Coal 3 8 



Shale (with obscure plant 



impressions) G 



i 



