Low Elevation
< 420 feet above mean sea level
Low Place
Illinois River
Low Quad Name
Nutwood
Low PLSS
3-24-8N-14W
Low Geology
Cahokia Alluvium
High Elevation
> 690 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Bedford
High PLSS
3-2-12N-13W
High Geology
Loess over Glasford till, perhaps over Mississippian Kinderhookian limestone
Area
541.04 square miles
Total Relief
270 feet
Percent Slope
1.36%