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desert ![click to hear : desert click to hear : desert](../../../images/speaker-vert.gif)
Hot region where aridity (less than 100 mm of annual rainfall) is such that plant and animal life is almost nonexistent.
saline lake ![click to hear : saline lake click to hear : saline lake](../../../images/speaker-vert.gif)
Lake characterized by high salt content due to considerable water evaporation and the concentration of dissolved mineral salts.
oasis ![click to hear : oasis click to hear : oasis](../../../images/speaker-vert.gif)
Desert zone made fertile by the presence of underground or surface water.
palm grove ![click to hear : palm grove click to hear : palm grove](../../../images/speaker-vert.gif)
Zone where palm trees are planted.
wadi ![click to hear : wadi click to hear : wadi](../../../images/speaker-vert.gif)
Often dry watercourse that is subject to sudden flooding in the event of rain.
mesa ![click to hear : mesa click to hear : mesa](../../../images/speaker-vert.gif)
Isolated plateau with a flat summit and very steep sides; it features a layer of rock that is resistant to erosion.
rocky desert ![click to hear : rocky desert click to hear : rocky desert](../../../images/speaker-vert.gif)
Most common type of desert, where rock fragments fracture due to temperature variations between night and day.
sandy desert ![click to hear : sandy desert click to hear : sandy desert](../../../images/speaker-vert.gif)
Desert where minuscule grains of rock (sand) form dunes by wind action.
needle ![click to hear : needle click to hear : needle](../../../images/speaker-vert.gif)
Tapering pointed column of rock shaped by the wind.
butte ![click to hear : butte click to hear : butte](../../../images/speaker-vert.gif)
Rocky hill shaped by erosion, with steep sides and a flat summit; it is smaller in area than a mesa.