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| Geology (2) |
| Geology -- Texas -- Lubbock County (2) |
| Stratigraphic -- Pliocene (2) |
| Geology -- West Texas (1) |
| Ogallala Formation (1) |
| Sedimentation and depositition (1) |
| Geology (2) |
| Geology -- Texas -- Lubbock County (2) |
| Stratigraphic -- Pliocene (2) |
| Geology -- West Texas (1) |
| Ogallala Formation (1) |
| Sedimentation and depositition (1) |