Subject
Geology, Stratigraphic
15
Geology, Structural
Powder River Basin (Wyo. and Mont.)
5
Electric logging
4
Geology
4
Paleogeography
2
Piceance Creek Basin (Colo.)
2
Uinta Basin (Utah and Colo.)
2
Geophysical well logging
1
Hydrogeology
1
Morphotectonics
1
Sedimentary rocks
1
Sedimentation and deposition
1
Williston Basin
1