|
|||
Henderson County
Low elevation: ~518 feet above mean sea level Place: Mississippi River 7.5' quadrangle name: Dallas City PLSS: 4-34-8N-7W Geology: Cahokia Allumium, river valley High elevation: >800 feet above mean sea level Place: Unnamed hilltop 7.5' quadrangle name: Raritan PLSS: 4-25-8N-4W Geology: Thin Illinois Kellerville till upland over Pennsylvanian Carbondale Formation Area: 391.97 square miles Total relief (approximate): 282 feet Average percent slope: 1.04%
|
|||
|
Home
| Search
| Site Map
| Contact Us State of Illinois | Illinois Department of Natural Resources | University of Illinois |
|||
| Updated 5/4/2007 JKH | |||