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Geology
Alphabetical index
123
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Trap
A trap is a stack of lava flows forming stepped cliffs. ...
Triassic
The Triassic was the first period of the secondary era ...
Triclinic system
The triclinic system is a crystal system of which the unit ...
Truncation
Truncation means replacing an edge or vertex of the ...
Tsunamite
A tsunamite is a deposit caused by the disturbance of ...
Tufa
Tufa is soft, white, chalky limestone.
Twinned crystal
A twinned crystal is the association of crystals of the same ...
Unconformity
Unconformity is the superimposing of strata with different ...
Undermining
Undermining is the hollowing action of flowing water (sea ...
Undulated green slate
Undulated green slate is a metamorphic stone of sedimentary ...
Uniaxial
Uniaxial is a term describing a crystal that has an index ...
Unit cell
A unit cell is the smallest volume conserving the ...
Useful substances
Useful substances are rocks or minerals used for their ...
VAN method
The VAN method is a method for detecting earth tremors ...
Volcanic rock
Volcanic rock is igneous rock which comes to the surface ...
Wadsleyite
Wadsleyite is a mineral from the mantle and some meteorites. ...
Wallastonite
Wallastonite is a contact stone, i.e. it is formed when ...
Water table
A water table (from the Greek "phrear" meaning a ...
Widmannstätten
The Widmannstätten structure is the appearance, during a ...
Xenomorph
A xenomorph is a mineral which, although crystallized, ...
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