ore-leaching tank - pad construction
- overconsolidation
- overcritically reflected wave
- overcrusting
- overcut
- overcutting
- overcutting jib
- overcutting machine
- overdeepening
- overdeepening by glaciers
- overfall
- overfault
- overflow
- overflow level
- overflow pipe
- overflow stage
- overflow water
- overflow waters
- overflow weir
- overfold
- overfold with local reliefs of middle limb
- overfold with nearly equal limbs
- overfold with reduced middle limb
- overfolded limb of the anticline
- overfolding
- overgrown soil
- overgrowth
- overhand
- overhand mining
- overhand stope
- overhand stope toe
- overhand stoping
- overhand stopping
- overhand-underhand stoping
- overhang
- overhang of arch
- overhanging beam
- overhanging crater walls
- overhaul cable
- overhaul cost
- overhead