cordierite-norite - crouan
- cotunnite
- cotylosaur
- Cotylosauria
- couch
- couch's whiting
- coulee
- coulisse
- couloir
- coulsonite
- coulter
- counter lode
- counter
- counter current
- counter headway
- counter time
- counter-chute
- counter-heading drivage
- counter-inclined faults
- counter-lateral septum
- counter-lode
- counter-quadrant
- counter-septum
- counter-stope mining
- counter-torque braking
- counter-vein
- counterbalanced
- counterbalanced cage
- counterclockwise
- countercurrent
- countercurrent cleaning
- counterflow
- counterflush drilling
- countergangway
- counterlevel
- counterpart
- counterscarp
- countertrade,
- counterweight hoisting
- counting
- countless