Subject
Petrology
54
Geology, Stratigraphic
28
Powder River Basin (Wyo. and Mont.)
26
Water quality
6
Geophysical well logging
5
Shale
5
Geology
4
Sedimentary rocks
4
Sandstone
3
Formations (Geology)
2
Igneous rocks
2
Mesaverde Group
2
Alkalic igneous rocks
1
Analytical geochemistry
1
Aquifers
1
Baird Mountains (Alaska)
1
Basalt
1
Batholiths
1
Bentonite
1
Cowboy Spring Wilderness (N.M.)
1
Drill core analysis
1
Drill cores
1
Geochemical prospecting
1
Geochemistry
1
Geochemistry Computer programs
1
Granite
1
Groundwater Quality
1
Igneous rocks Analysis
1
Intrusions (Geology)
1
Magmatism
1
Magnetic susceptibility
1
Manganese oxides
1
Mines and mineral resources
1
Niobrara Formation
1
Ores
1
Petrology Computer programs
1
Petrology Mathematics
1
Phase diagrams Computer programs
1
Quartz
1
Radioactive dating
1
Rocks Density
1
Solution mining Testing
1