GLACIAL OR ICE-LAID DEPOSITS 



49 



Fia. 44. A section showing the black Bangamon soil with the Illinois glacial drift 

 beneath and tho lowun loess above, with the present soil on the surface. Knox County, 

 Illinois. (F. Leverett, LI. S. Geol. Survey.) 



Fio. 45. A section showing fal nionminRtoi 

 loess; (d) Sangamon soil; (e) Silt below peat. 



urnvrl; (b) Shelby villo till shoot; (c) lowi 

 (Dr. Samuel Calvin, U. S. Geol. Survey.) 



