302 ASSINNIBOINE AND SASKATCHEWAN EXPEDITION. 



At least seven miles of this distance is so nearly hori- 

 zontal that it does not rise twenty feet above Dauphin 

 Lake, and the dip of the Devonian strata is uniformly at a 

 very small angle to the south-west, where exposures were 

 seen on Manitobah Lake. (Small local deviations from a 

 uniform dip on Snake Island and Moss Eiver are noticed 

 in Chapters XXIV. and XXV.) The Cretaceous shales 

 were found exposed on the flanks of the mountain, about 

 400 feet above Dauphin Lake, and the rise from the level 

 country at the foot of the mountain to that altitude is 

 embraced within two and a half or three miles ; yet 

 within this narrow limit the drift on the slopes between 

 each terrace, on the terraces themselves, or in the bottom 

 of gullies excavated by mountain streams, gave no evi- 

 dence of other rocks than those already named. It must 

 be admitted that the time I could devote to an examina- 

 tion of the boulders was short, and a more minute search 

 might give other results. 



With this negative evidence in view, it appears pro- 

 bable that the Carboniferous Series is not represented in 

 the only locality where it may be looked for with much 

 chance of success. Nevertheless, between the Devonian 

 and Cretaceous Series in the basin of Lake Winnipeg 

 there is still a vertical section fully 400 feet in altitude, 

 which is concealed by drift on the flanks of the Riding 

 Mountain, covering a horizontal area two and a half to 

 three miles broad. It is possible that within this narrow 

 limit, or further to the north where the area may be much 

 broader, rocks of Carboniferous, Permian, Triassic, or Ju- 

 rassic age, may yet be found. With a view to show the re- 

 lation which the Cretaceous and Carboniferous Series have 

 to one another in lower latitudes, the following brief notice 

 of their occurrence in Nebraska and Kansas is introduced. 



In Nebraska the Carboniferous Series, or the coal 



