Subject
Petroleum
Natural gas
36
Geology
33
Wilderness areas
16
Petroleum Geology
15
National Petroleum Reserve (Alaska)
11
Paleontology
8
Foraminifera, Fossil
7
Micropaleontology
7
North Slope (Alaska)
7
Oil fields
7
Coal
6
Borings
5
Petroleum reserves
5
Geology, Stratigraphic
4
Natural gas Geology
4
Natural gas reserves
4
Earth temperature
3
Cherokee Group
2
Mines and mineral resources
2
Monterey Formation (Calif.)
2
Bakken Formation
1
Carbon County (Wyo.)
1
Chugwater Group (Wyo.)
1
Coal mines and mining
1
Colville River Watershed (Alaska)
1
Donets Basin (Ukraine and Russia)
1
Faults (Geology)
1
Fish Creek (North Slope Borough, Alaska)
1
Fresno County (Calif.)
1
Gas fields
1
Geology, Economic
1
Gravimeters (Geophysical instruments)
1
Gravity Measurement
1
Hanna Basin (Wyo.)
1
Hot Springs County (Wyo.)
1
Hot springs
1
Kerogen
1
Killik River (Alaska)
1
Killik River Watershed (Alaska)
1
Minerals
1
Naval Petroleum Reserve Number 3 (Wyo.)
1
Oil fields Analysis
1
Oil-shales
1
Pannonia Region
1
Petroleum industry and trade
1
Prospecting Geophysical methods
1
Seismology
1
Shale gas
1
South Sumatra Basin (Indonesia)
1