Low Elevation
< 360 feet above mean sea level
Low Place
Mississippi River
Low Quad Name
Rockwood
Low PLSS
3-8-8S-5W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 740 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Rockwood
High PLSS
3-29-8S-5W
High Geology
Thin Vandalia Till over Pennsylvanian Caseyville Sandstone
Area
588.68 square miles
Total Relief
380 feet
Percent Slope
1.67%