587 wells on file. Open this county on the map.
Depth range is measured from the wells on file, not a regional average.
| Formation | Wells | Producing | Shallowest | Average | Deepest | Cumulative |
|---|---|---|---|---|---|---|
| Arbuckle Group | 98 | 0 | 1,865 ft | 3,293 ft | 3,670 ft | — |
| Simpson Group Lower | 88 | 0 | 1,669 ft | 3,254 ft | 3,550 ft | — |
| Viola Limestone | 72 | 5 | 2,193 ft | 3,113 ft | 3,460 ft | — |
| Arbuckle | 29 | 6 | 2,279 ft | 3,114 ft | 3,500 ft | — |
| Viola | 23 | 1 | 400 ft | 3,049 ft | 3,440 ft | — |
| Hunton Group | 17 | 0 | 2,060 ft | 2,741 ft | 3,230 ft | — |
| Mississippian | 14 | 0 | 1,987 ft | 2,706 ft | 3,753 ft | — |
| Ordovician System | 13 | 0 | 2,235 ft | 3,136 ft | 3,420 ft | — |
| Simpson | 13 | 4 | 2,942 ft | 3,201 ft | 3,470 ft | — |
| Viola, Simpson | 8 | 1 | 3,077 ft | 3,306 ft | 3,486 ft | — |
| Cambrian System | 7 | 1 | 3,353 ft | 3,464 ft | 3,600 ft | — |
| Precambrian System | 7 | 0 | 1,234 ft | 1,941 ft | 3,296 ft | — |
| Hunton | 5 | 1 | 1,995 ft | 2,451 ft | 3,500 ft | — |
| Kansas City | 5 | 2 | 2,000 ft | 2,273 ft | 3,350 ft | — |
| Viola Limestone Formation | 5 | 0 | 2,865 ft | 2,994 ft | 3,418 ft | — |
| St Peter | 3 | 0 | 3,120 ft | 3,303 ft | 3,395 ft | — |
| Viol | 3 | 1 | 3,130 ft | 3,236 ft | 3,445 ft | — |
| Pennsylvanian | 2 | 0 | 2,688 ft | 2,688 ft | 2,688 ft | — |
| Decorah Shale | 2 | 0 | 3,094 ft | 3,164 ft | 3,234 ft | — |
| Aw, Cw, Drywood, And Weir-Pitt Coals | 2 | 0 | 2,338 ft | 2,339 ft | 2,339 ft | — |
| Kinderhookian | 2 | 0 | 2,575 ft | 2,688 ft | 2,801 ft | — |
| Viola Lime | 1 | 0 | 2,932 ft | 2,932 ft | 2,932 ft | — |
| Aw, Cw, Drywood, Weir-Pitt Coals | 1 | 0 | 2,408 ft | 2,408 ft | 2,408 ft | — |
| Tertiary | 1 | 0 | 300 ft | 300 ft | 300 ft | — |
| Sylvan Shale | 1 | 0 | 1,919 ft | 1,919 ft | 1,919 ft | — |
| Weir Coal, Cherokee Coals, Dry Wood, Rowe | 1 | 0 | 2,342 ft | 2,342 ft | 2,342 ft | — |
| Simpson Sand | 1 | 0 | 3,218 ft | 3,218 ft | 3,218 ft | — |
| Simpson Group Sandstone | 1 | 0 | 3,400 ft | 3,400 ft | 3,400 ft | — |
| Cherokee Group | 1 | 0 | 2,380 ft | 2,380 ft | 2,380 ft | — |
| Permian System | 1 | 0 | 735 ft | 735 ft | 735 ft | — |
| Cretaceous System | 1 | 0 | 300 ft | 300 ft | 300 ft | — |
| Maquoketa Shale | 1 | 0 | 3,385 ft | 3,385 ft | 3,385 ft | — |
| Kansas City Group | 1 | 0 | 1,297 ft | 1,297 ft | 1,297 ft | — |
| Hunton, Viola | 1 | 1 | 2,300 ft | 2,300 ft | 2,300 ft | — |
| Hntn | 1 | 0 | 3,307 ft | 3,307 ft | 3,307 ft | — |
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