Low Elevation
< 360 feet above mean sea level
Low Place
Kaskaskia River
Low Quad Name
Red Bud
Low PLSS
3-32-3S-7W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 700 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Columbia
High PLSS
3-13-1S-10W
High Geology
Vandalia till uplands over Mississippian Upper Valmeyeran
Area
666.66 square miles
Total Relief
340 feet
Percent Slope
0.99%