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API 4004120010 · Dewey County, South Dakota · Lantry field
Abandoned-Not RegulatedDry Hole
API
4004120010
Operator
Timberline Oil and Gas Corp.
County
Dewey
Field
Lantry
Location
Permit
608
Formation tops
South Dakota records 16 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Niobrara Formation | 1,390 | Cretaceous |
| Greenhorn Limestone | 2,185 | Cretaceous |
| Belle Fourche Shale | 2,215 | Cretaceous |
| Mowry Shale | 2,700 | Cretaceous |
| Dakota Mud | 2,780 | Cretaceous |
| Fall River Sandstone | 2,950 | Cretaceous |
| Sundance Formation | 3,080 | Triassic |
| Piper Formation | 3,280 | Triassic |
| Minnelusa Formation | 3,340 | Permian/Pennsylvanian |
| Charles Formation | 4,040 | Mississippian |
| Mission Canyon Limestone | 4,150 | Mississippian |
| Lodgepole Limestone | 4,420 | Mississippian |
| Three Forks Shale | 4,720 | Devonian |
| Duperow Formation | 4,760 | Devonian |
| Stony Mountain Formation | 4,960 | Ordovician |
| Red River Formation | 5,024 | Ordovician |
A dash is a formation South Dakota records for this well without a depth.
Completion
South Dakota files 1 completion report for this well.
Vertical Well
Abandoned-Not RegulatedDry HoleSpudded
1971-02-04
Measured depth
5,075 ft
True vertical depth
5,075 ft
Location
45.044434, -101.458560
45.04443, -101.45856 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom
Every well in Dewey County, South Dakota
South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.