Low Elevation
< 420 feet above mean sea level
Low Place
Mississippi River
Low Quad Name
Elsah
Low PLSS
3-36-6N-11W
Low Geology
Cahokia Alluvium, river valley
High Elevation
> 885 feet above mean sea level
High Place
unnamed hilltop
High Quad Name
Otterville
High PLSS
3-36-7N-13W
High Geology
Mississippian Kinderhookian Limestone ridge
Area
373.43 square miles
Total Relief
465 feet
Percent Slope
2.17%