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Alaska North Slope Landsat image of U.S. Geological Survey studies areas: NPRA, ANWR 1002 Area, and Central North Slope. (Larger Image) |
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Map of
NPRA; (boundary shown by yellow line). (Larger Image) |
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Fig. 5 -- Histograms showing expected (mean) numbers ofoil and nonassociated gas accumulations (Larger Image) |
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Table 1 USGS estimates of volumes of technically recoverable oil and nonassociated gas in the NPRA studies areas. (Larger Image) |
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Table 3 -- Comparisons of the 1988 ANWR and 2002 NPRA USGS assessments. Volumes of technically recoverable oil. (Larger Image) |
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Midnight rainbow over Atigun Gorge. Lightcolored carbonate rocks of the Carboniferous Lisburne Group form the main bluffs above darker colored rocks of the Permian Echooka Formation in an overturned section. Location near Trans-Alaska Pipeline in Brooks Range foothills, about 90 miles east of NPRA. Photo by Dave Houseknecht. (Larger Image)
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Geologist describes conglomerates in Cobblestone Sandstone Member of Fortress Mountain Formation. Large tan block is clast of sandstone in conglomerate. Location in Brooks Range foothills, about 80 miles southeast of Umiat. Photo by Dave Houseknecht. (Larger Image) |
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U.S. Department of the Interior |
U.S. Geological Survey
