Geology Abbreviations and Acronyms

1. ONPR
   Office of Naval Petroleum and Oil Shale Reserves
2. OPL
   Opal
3. OPQ
   Opaque Mineral
4. OPUS
   Online Positioning User Service
5. OPX
   Orthopyroxene
6. ORES
   Online Resources for Earth Scientists
7. ORP
   Orpiment
8. ORS
   Old Red Sandstone
9. OSM
   Osumilite
10. OUGS
    Open University Geological Society
11. OVSP
    Offset-Soxrce Vertical Seismic Profile
12. OVSP
    Offset-source Vertical Seismic Profile
13. OXN
    Oxnard Aquifer
14. PA
    Position Approximate
15. PACS
    Physics and Astronomy Classification Schemex
16. PAD
    Pecroleum Administration for Defense
17. PALE
    Paleoclimate of Arctic Lakes and Estuaries
18. PB
    Primary Basin
19. PB
    Prosodic Boundary
20. PBO
    Plate Boundary Observatory

Last updated: May 24, 2020 — Total entries: 1,780