Low Elevation
< 425 feet above mean sea level
Low Place
Illinois River
Low Quad Name
Pearl East
Low PLSS
4-34-7S-2W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 880 feet above mean sea level
High Place
South edge of the town of Baylis
High Quad Name
Baylis
High PLSS
4-18-4S-4W
High Geology
Cretaceous ridge
Area
837.40 square miles
Total Relief
455 feet
Percent Slope
1.90%