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Subject
- Geology[remove]64
- Geology, Stratigraphic33
- Mines and mineral resources4
- Paleontology4
- Conglomerate2
- Petroleum2
- Petrology2
- Prehistoric peoples2
- Stratigraphic correlation2
- Volcanic ash, tuff, etc2
- Borings1
- Chickasaw Indians1
- Continental margins1
- Environmental protection1
- Formations (Geology)1
- Geologists1
- Gilbert, Grove Karl, 1843-19181
- Gold ores1
- Landslides1
- Mollusks, Fossil1