| Abbreviation | Definition |
|---|---|
| BIF | Banded Iron Formation |
| BIMS | British and Irish Meteorite Society |
| BJG | Brazilian Journal of Geology |
| BLM | Bureau of Land Management |
| BLS | Below Land Surface |
| BME | Bulk Mining Explosives |
| BOMG | Bulletin Of the Marine Geology |
| BP | Before Present |
| BPL | Bone Phosphate of Lime |
| BR | Basic Region |
| BRB | Barbados Seismograph station code |
| BRV | Borovoye Geophysical Observatory |
| BS | Baltic Shield |
| BS | Bulk Sample |
| BS&W | Basic Sediment and Water |
| BSE | Bulk Silicate Earth |
| BSR | Bottom Stimulating Reflectors |
| C | Cut |
| CACS | Canadian Active Control System |
| CACY | CAlifornia Clay Loam |