22 ABSTRACT OF VOLUME. 



the Grand River outlet to Lake Chicago in the Lake Michigan Basin. The discussion 

 is restricted to the part of the beaches which border the west and south sides of the 

 Erie Basin. Attention is called to the marked warping displayed by the beaches in 

 the eastern part of the Erie Basin, and the contrast with the nearly horizontal attitude 

 to the west. 



In this chapter the lowering of the lake from Lake Warren to Lake Iroquois is 

 briefly considered, and the probable relations of the lake to the ice sheet are set forth. 



Chapter XVII. Soils. — The soils are classified according to their origin, the 

 following classes being recognized : Residuarj' soils, bowlder-clay soils, gravelly 

 soils, sandy soils, loamy soils grading into fine silts, peaty or organic soils. 



