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canyon A deep valley with steep sides, often with a stream flowing through it.
floodplain A nearly flat plain along the course of a stream or river that is naturally subject to flooding.
Mountain A natural elevation of the Earth's surface rising more or less abruptly to a summit, greater than a hill, usually greater than 2,000 feet.
Steppe An extensive plain, especially one without trees.
Marsh A tract of low wet land, often treeless and periodically inundated generally characterized by a growth of grasses, sedges, cattails, and rushes.
Oasis A small fertile or green area in a desert region usually having a spring or a well.
Prairie A tract of grassland; meadow.
Plateau A land area having a relatively level surface considerably raised above adjoining land on at least one side, and often cut by deep canyons.
Desert A region so arid because of little rainfall that it supports only sparse and widely spread vegetation or no vegetation at all.
Valley An elongated depression between uplands, hills, or mountains, especially one following the course of a stream.
Delta A nearly flat plain of alluvial deposit between diverging branches of the mouth of a river, often, though not necessarily triangular.
Mesa A land formation less extensive than a plateau, having steep walls and a relatively flat top and common in arid and semiarid parts of the SW United States and Mexico.
Created by: betsywellman
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