SALINE WATEE FKOM THE DAKOTA SANDSTONE. 



527 



pipe to a periuaueut level, below which in most cases it cau not l^e lowered 

 by pumping, as a ctintinual supply is received from the distant portions 

 of the subterranean reservoir. 



SALINE AND ALKALINE WATER FROM THE DAKOTA SANDSTONE. 



North of Crookston and Blanchard to the international boundary and 

 in the south edge of IManitoba the water of the artesian wells, almost with- 

 out exception, tastes distinctly saline and alkaline. It seems very pi'obable 



Fig. 32 Section acroaa the Red Kiver Valley, sbowiuj; the water supply of its I'resb artt-siau wells. Horizontal scale, 



15 miles to an inch. 



that the water-bearing beds of that large portion of the Red River Valley 

 diflFer widely in the origin of their water supply froni the foregoing. Instead 

 of deriving their water, like the fresh artesian wells, from rainfall upon 

 higher parts of the drift surface contiguons to the Red River Valley, there 

 seem to be good reasons for believing that the brackish water is mainly 



t'erl^/Zey 



Fio. 33.— Section from the Kocky Mountains to the Keil River Valley, showing the water supply of its saline artesian 

 wells. Horizontal scale, 150 miles to an inch. 



from the Dakota sandstone, which forms the base of the Cretaceous series in 

 the upper Missouri, As.siniboine, and Saskatchewan basins, coming tlu-ough 

 that sandstone from its outcrops on the flanks of the Rocky Mountains 

 and Black Hills, and permeating upward into the drift of the Red River 

 Valley from areas where this sandstone is the underlying bed-rock (fig. 33). 

 That the saline artesian waters found within the basin of Lake Agassiz 



