uncrossed - ussingite
- upper and lower contacts of zone
- Upper Angara strata
- upper apex of fold
- upper bar
- upper bend
- upper bend of flexure
- upper break
- upper chamber
- upper coal
- upper coal measure
- upper coal measures
- Upper Cretaceous
- upper cretaceous "basement"
- upper edge
- upper entry
- upper gate
- upper half-space
- upper harmonics
- Upper Jurassic
- upper jurassic
- upper layer
- upper leaf
- Upper Lena suite
- upper level
- upper limb
- upper mantle
- upper miocene
- upper miocene-pliocene
- upper moon's transit
- upper ochre
- upper ochre interval
- upper ochre zone
- upper orange
- upper orange interval
- upper orange zone
- upper paleozoic era
- upper porosity 1900
- upper reaches
- upper refractor
- Upper Riphean-Vendian Uzunbulak suite sandstone and shale