Geology Abbreviations and Acronyms
- RCRadius of Curvature of River Or Stream
- RCRock Collection
- RCMGRenard Centre of Marine Geology
- RCMNSRegional Committee On Mediterranean Neogene Stratigraphy
- RCTRichterite
- RCZRural Coastal Zone
- RDGRidge
- RDGERidge
- RDHReference Datum Height
- RDNRhodonite
- RDSRhodochrosite
- REBResearch Earth Borer
- RESRock Engineeringjsystem
- RFZRomanche Fracture Zone
- RGRidge
- RGDRapid Gravity Dewatering
- RGRRio Grande Rift
- RGVRio Grande Valley
- RIReport of Investigations
- RIGRunning In Geound
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