260 



THE GEOLOGY OF MINNESOTA. 



[Drift. 



FIG. 12. STRATIFICATION OF SUGAR LOAF, WINONA. 

 THE DRIFT. 



"What has been said respecting this deposit in the report on Houston 

 county is almost equally true of it in Winona county. In the western part, 

 however, of this county, the true glacier- drift begins to appear. The map 

 of the county does not represent it, since the rock formations are well known 

 and should be represented rather than the drift. It would be impossible 

 moreover, to define the eastern boundary of the true glacier-drift in Winona 

 county, since it thins out imperceptibly under the loess-loam. A few locali- 

 ties where it can be seen by any observer will here be mentioned, but it is 

 very probable that it will be found in many places farther east than any 

 here designated. 



There is an exposure of till with small boulders, N. E. J sec. 33, Elba, by the grading of the 

 road, also in the S. E. J sec. 34. There is a little gravel with stones, and one red quartzyte boulder, 

 about 2J miles southeast of Lewiston, by the railroad. 



There is a plenty of drift one mile south of Utica, in the southern part of section 19. 



