Digital recovery, modification, and analysis of
Tetra Tech seismic horizon mapping, National
Petroleum Reserve Alaska (NPRA), northern Alaska
by Saltus, R.W., Kulander, C.S., and Potter, C.J.

Data Appendix

See Tables 1 and 2 in the report chapter for listing
of all the data file names.  See Figure 2 in the report
for the association of Tetra Tech numeric horizon
names with current USGS horizon names.

All the data files are in ASCII format with 
location coordinates given in both latitude, longitude 
(NAD27 datum), and projected meters (Albers conformal
conic projection, NAD27 datum, standard parallels of
55 and 65 degrees north, base latitude of 50 degrees
north and central meridian of 154 degrees west).

Stratigraphic horizon abbreviations:

SRF = topographic surface
NNU = Nanushuk
FM = Fortress Mountain
LCU = Lower Cretaceous Unconformity
SAG = Sag River
SAD = Sadlerochit
ECH = Echooka
LIS = Lisburne
ICF = Intermediate Composite Features
ALA = Alapah
END = Endicott
BMT = Basement