| Rock Unit | Depth, Feet |
|---|---|
| Surficial Deposits and/or Gubik Formation | 28 |
| Nanushuk Group | 80 |
| Torok Formation | 2470 |
| Pebble Shale Unit | 6195 |
| Kingak Shale | 6525 |
| Sag River Sandstone | 8340 |
| Shublik Formation | 8465 |
| Fire Creek Siltstone Member of the Ivishak Formation, Sadlerochit Group | 8740 |
| Ledge Sandstone Member of the Ivishak Formation. Sadlerochit Group | 8855 |
| Kavik Member of the Ivishak Formation, Sadlerochit Group | 9360 |
| Echooka Formation, Sadlerochit Group | 9475 |
| Basement Complex | 9640 |
Data Source:
Table 15.3. - Total depth and depths to selected stratigraphic horizons
for Government-drilled wells on the North Slope of Alaska., in:
Gryc, George, Ed., 1988, Geology and exploration of the National Petroleum
Reserve in Alaska, 1974 to 1982, U.S. Geological Survey Professional
Paper 1399, Pgs. 322 - 324.
