uncrossed - ussingite
- upstream slope
- upstream water
- upsweep
- upsweep signal
- upsweeping
- upswell
- uptake
- upthrow
- upthrow fault
- upthrow side
- upthrown
- upthrown block
- upthrown fault block
- upthrown side
- upthrown wall
- upthrust
- upthrust fault
- upthrusting
- uptrace
- uptrusion
- upturned
- upturning of beds
- upwall
- upward
- upward buckling
- upward continuation
- upward current
- upward digging
- upward dislocation
- upward flow
- upward gradient
- upward mining
- upward raypath
- upward traveling wave
- upward wavefield continuation
- upward-continued field
- upwarped district
- upwarping
- upwell
- upwell water