a flat-topped hill with steep sides; a column of rock
a dry region with little or no rainfall
a mound or ridge of windblown sand
a flat-topped hill wit steep sides; larger than a butte
a place in the desert where there is a source of water and where plants grow
a map that shows natural landforms and waterways on Earth's surface
flat-topped hill with steep sides; larger than a mesa
a vast region covered by sand and dunes
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