Low Elevation
< 375 feet above mean sea level
Low Place
Mississippi River
Low Quad Name
Bloomsdale
Low PLSS
3-21-5S-10W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 800 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Valmeyer
High PLSS
3-11-3S-11W
High Geology
Loess hills over Mississippian Middle Valmeyeran limestone
Area
393.49 square miles
Total Relief
425 feet
Percent Slope
1.74%