Low Elevation
< 505 feet above mean sea level
Low Place
Embarras River
Low Quad Name
Greenup
Low PLSS
3-32-9N-9E
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 675 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Neoga
High PLSS
3-10-10N-7E
High Geology
Illinois Vandalia till upland
Area
342.94 square miles
Total Relief
170 feet
Percent Slope
0.73%