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.

Map Appendix

See Tables 2, 3, and 4 in the report chapter for listing
of all the map names.

All the maps are in PDF format created with Adobe Illustrator 9.0.2.

Map prefix meanings:

CLS = Closure maps
DD = Depth difference maps, Tetra Tech depths compared with USGS depths
DIFF = Depth difference maps, USGS depth-corrected maps compared with borehole depths
HRZ = USGS depth-corrected horizon maps
ISO = Isopach maps

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

Play abbreviations:

DTS = Brookian Topset Structural
TOR = Torok Structural
SAG = Sag River (obsolete play - not used in assessment)
SAD = Ellesmerian Ivishak
ECH = Ellemserian Echooka
LIS = Ellesmerian Lisburne
END = Ellesmerian Endicott