Low Elevation
< 465 feet above mean sea level
Low Place
Mississippi River
Low Quad Name
Marblehead
Low PLSS
4-32-3S-8W
Low Geology
Cahokia Alluvium in river valley
High Elevation
> 860 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Fishhook
High PLSS
4-35-3S-5W
High Geology
Loess over Cretaceous hill
Area
861.86 square miles
Total Relief
395 feet
Percent Slope
1.41%