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
IKPIKPUK 1   Surficial Deposits and/or Gubik Formation                                 20.00                 
IKPIKPUK 1   Nanushuk Group                                                            100.00                
IKPIKPUK 1   Torok Formation                                                           2950.00               
IKPIKPUK 1   Pebble Shale Unit                                                         7230.00               
IKPIKPUK 1   Kingak Shale                                                              7480.00               
IKPIKPUK 1   Sag River Sandstone                                                       9845.00               
IKPIKPUK 1   Shublik Formation                                                         9905.00               
IKPIKPUK 1   Fire Creek Siltstone Member of the Ivishak Formation, Sadlerochit Group   10395.00              
IKPIKPUK 1   Ledge Sandstone Member of the Ivishak Formation. Sadlerochit Group        10600.00              
IKPIKPUK 1   Kavik Member of the Ivishak Formation, Sadlerochit Group                  11100.00              
IKPIKPUK 1   Echooka Formation, Sadlerochit Group                                      11295.00              
IKPIKPUK 1   Lisburne Group                                                            11445.00              
IKPIKPUK 1   Endicott Group                                                            14550.00              
IKPIKPUK 1   Basement Complex                                                          15320.00              

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.