Low Elevation
< 300 feet above mean sea level
Low Place
Ohio River
Low Quad Name
Cairo
Low PLSS
3-1-17S-1W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 500 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Dongola
High PLSS
3-4-14S-1W
High Geology
Mississippian Middle Valmeyeran ridge
Area
201.20 square miles
Total Relief
220 feet
Percent Slope
0.96%