Pynciau a Argymhellir
- Geology 4 canlyniadau
- Mines and mineral resources 4 canlyniadau
- Mineral industries 2 canlyniadau
- Basins (Geology) 1 canlyniadau
- Bibliography 1 canlyniadau
- Earthquakes 1 canlyniadau
- Geology, Economic 1 canlyniadau
- Geomorphology 1 canlyniadau
- Mineral lands 1 canlyniadau
- Petroleum 1 canlyniadau
- Petroleum in submerged lands 1 canlyniadau
- Phosphates 1 canlyniadau
- Reserves 1 canlyniadau
- Sea-floor spreading 1 canlyniadau
- Tsunamis 1 canlyniadau