Low Elevation
< 360 feet above mean sea level
Low Place
Wabash River
Low Quad Name
Grayville
Low PLSS
2-16-3S-14W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 590 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Lancaster
High PLSS
2-15-1N-13W
High Geology
Thin Illinois Vandalia till over Pennsylvanian Mattoon Formation
Area
225.04 square miles
Total Relief
230 feet
Percent Slope
0.96%