THE BLOOMINGTON MOEAINIC SYSTEM. 



245 



RANGE IN ALTITUDE. 



This morainic system presents a range in altitude of only about 300 feet, 

 its highest points being slightly more than 1,000 feet above tide, while few 

 points, aside from valleys, fall below 700 feet. The range, both along the 

 crest and along the immediate outer border, is set forth by counties in the 

 following - table: 



Table showing range in altitude of the Bloomington morainic system. 



Dekalb (Illinois) 



Ogle (Illinois) 



Lee (Illinois) 



Bureau (Illinois) 



Marshall (Illinois) . . . 



Peoria (Illinois) 



Tazewell (Illinois) . . . 



McLean (Illinois) 



Ford (Illinois) 



Champaign (Illinois) 

 Vermilion (Illinois) . 

 Warren (Indiana) ... 

 Benton (Indiana) 



Feet. 

 875- 975 

 875- 940 

 900-1, 025 

 700- 989 

 800- 900 

 700- 830 

 700- 825 

 775- 913 



775- 

 750- 



700- 

 750- 



860 

 830 



790 

 775 

 825 



Feet. 

 775-850 

 790-820 

 740-860 

 675-825 

 700-800 

 650-775 

 650-725 

 700-820 

 740-760 

 700-760 

 630-700 

 625-675 

 675-725 



SURFACE CONTOURS. 



A general statement can scarcely be made which will set forth the vari- 

 ations in contour or topographic expression of this morainic system through- 

 out its entire length. It is found convenient to discuss it in sections, 

 beginning at the north and proceeding southward. The first section 

 embraces the portion between western Kane County, where this system 

 separates from the morainic complex of northern Illinois, and the head ol 

 Bureau Creek in northeastern Lee County, a section 35 or 40 miles in 

 length. The second section (about 50 miles) embraces the portion drained 

 by Bureau Creek and its tributaries. The third section (40 miles) embraces 

 the portion along the west side of the Illinois in Bureau, Marshall, and 

 Peoria counties. The fourth section (20 miles) embraces the portion 



