| Key | |
| X-Axis | Distace between wells in feet |
| Y-Axis | Elevation above MSL in feet |
| Vertical Exaggeration | 25 |
| Qal (Cahokia Formation) | Yellow |
| Hen 1 (Henry Formation) | Pale Yellow |
| Hb (Beverly Tongue) | Brown |
| Wt (Tiskilwa) | Green |
| Ha (Ashmore Tongue) | Tan |
| G1 (Glasford 1) | Pink |
| GS1 (Glasford 1 Sand/Gravel) | Salmon |
| G2 (Glasford 2) | Purple |
| GS2 (Glasford 2 Sand/Gravel) | White |
| Bedrock | Rectangles |