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R. C. WALLACE 



Winnipegosis. Around the springs are flats, absolutely devoid of 

 vegetation, from a half-acre, as the case may be, to several hundred 

 acres in extent. These the traveler may quite unexpectedly find 

 in the midst of a dense forest; but the majority of the springs are 

 to be found in close proximity to river or lake. 



The brines are not confined to a single geological horizon. 

 They appear in both the Winnipegosan dolomite and Manitoban 



Fig. 1 — Bowlder-strewn salt flat, Geikie's Creek, Sagemace Bay, Lake Winnepegosis 



limestone, the combined thickness of which is approximately 250 

 feet. Owing to the comparatively level surface and the appre- 

 ciable dip of the strata toward the west, the difference in elevation 

 between the various springs is very small — not more than 50 feet. 

 The springs may consequently be referred with greater exactness 

 to a contour horizon than to any geological horizon. 



The Dakota sandstone, which directly overlies the compara- 

 tively porous Devonian strata, is a well-known water-bearing 



