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| Geology (2) |
| Stratigraphic -- New Mexico (2) |
| Stratigraphic -- Pennsylvanian (2) |
| Geology -- New Mexico -- Lincoln County (1) |
| Geology -- New Mexico -- Tecolote Mountain area (1) |
| Geology (2) |
| Stratigraphic -- New Mexico (2) |
| Stratigraphic -- Pennsylvanian (2) |
| Geology -- New Mexico -- Lincoln County (1) |
| Geology -- New Mexico -- Tecolote Mountain area (1) |