Dept. of the Interior
U.S. Geological Survey
Energy Resources Team

Selected Data from Eleven Wildcat Wells in 
the National Petroleum Reserve in Alaska

USGS Open File Report 99-015


Depths to Selected Stratigraphic Horizons

WELL NAME   ROCK UNIT                                                                 DEPTH, FEET
PEARD 1     Surficial Deposits and/or Gubik Formation                                 28.00                 
PEARD 1     Nanushuk Group                                                            80.00                 
PEARD 1     Torok Formation                                                           2470.00               
PEARD 1     Pebble Shale Unit                                                         6195.00               
PEARD 1     Kingak Shale                                                              6525.00               
PEARD 1     Sag River Sandstone                                                       8340.00               
PEARD 1     Shublik Formation                                                         8465.00               
PEARD 1     Fire Creek Siltstone Member of the Ivishak Formation, Sadlerochit Group   8740.00               
PEARD 1     Ledge Sandstone Member of the Ivishak Formation. Sadlerochit Group        8855.00               
PEARD 1     Kavik Member of the Ivishak Formation, Sadlerochit Group                  9360.00               
PEARD 1     Echooka Formation, Sadlerochit Group                                      9475.00               
PEARD 1     Basement Complex                                                          9640.00               

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.