THE HISTORY OF DEVILS LAKE, WISCONSIN 369 



It is clear from a study of the post-Glacial drainage conditions 

 east of Devils Lake that the water from Shubring Lake and the 

 Steinke Basin continued to drain into Devils Lake by way of Peck 

 flat for a time at least after the withdrawal of the edge of the ice. 

 These conditions must have persisted until a tributary of the Bara- 

 boo River had time to work headward up through the ground 

 moraine on the slope of the South Range and through the terminal 



Fig. 5. — Sketch map showing the conditions of drainage around Devils Lake 

 during the first and second stages in the post-Glacial history of the lake. The endless 

 line marks the boundaries of the drainage basin of the lake during these stages. 



moraine, to tap the Shubring and Steinke basins and divert their 

 drainage to the north, inaugurating present conditions. The 

 establishment of present drainage would require at least a time 

 commensurate with the time involved in the lowering of the outlet 

 of Devils Lake to the 970-foot level. 



So long as Devils Lake had an outlet to the north, that is, until 

 the 970-foot stage was reached, the boundaries of its basin must 

 have been somewhat as shown in Fig. 5 . 



