radiation intensity - recovery hook
- receiver tool
- receiving antenna
- receiving bin
- receiving boom
- receiving box
- receiving bunker
- receiving coil
- receiving end
- receiving loop
- receiving track
- recemented glacier
- recementing
- recent
- recent age
- recent beds
- recent epoch
- recent flow
- recent geosyncline
- recent life
- recent period
- recent placer
- recent platform
- recent quaternary group
- recent sands
- recent sediments
- recent system
- recent tectonics
- recently recognized east dipping structures
- receptacle
- receptaculitid
- reception basin
- receptor
- recess
- recession
- recession of level
- recession of valley sides
- recessional moraine
- recessive
- recharge
- recharge area