YELLOW MEDICINE, LYON AND LINCOLN COUNTIES, 1884. WARREN UPHAM. 



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On the coteau are numerous lakes, and there are a few in Lucas, Posen and Echo. 

 The largest is lake Benton, in Lincoln county, lying between the outer and the inner 

 moraines. Most of these counties east of the coteau are monotonously flat, and occa- 

 sionally swampy, possessing a strong and deep soil. Below the drift are known 

 Cretaceous and Archean rocks. The former holds a little lignite and considerable 

 quantities of kaolin. The latter is exposed chiefly in the valley of the Minnesota, 

 especially at Granite Falls and Minnesota Falls. It rises above the drift in Echo 

 and Posen. N. H. w. 



