Friday, October 6, 2017

Erosion Landforms

The following landforms are the result of either erosion or weathering or a combination of both.

• butte—an isolated hill with steep, often vertical sides and a small, relatively flat top (smaller than mesas, plateaus, and tables).
• canyon—a deep valley between cliffs, often carved from the landscape by a river.
• cuesta—a ridge formed by gently tilted sedimentary rock strata in a homoclinal structure.
• dissected plateau—a plateau area that has been uplifted, then severely eroded so that the relief is sharp.
• eolianite—any rock formed by the lithification of sediment deposited by Aeolian processes (i.e., the wind).
• gulch—a deep V-shaped valley formed by erosion.
• gully—a landform created by running water eroding sharply into soil, typically on a hillside.
• hogback—a homoclinal ridge, formed from a monocline, composed of steeply tilted strata rock protruding from the surrounding area.
• hoodoo—a tall, thin spire of rock that protrudes from the bottom of an arid drainage basin or badland.
• lavaka—a type of erosional feature common in Madagascar.
• limestone pavement—a natural karst landform consisting of a flat, incised surface of exposed limestone that resembles an artificial pavement.
• malpais—a landform characterized by eroded rocks of volcanic origin in an arid environment.
• mesa—an elevated area of land with a flat top and sides that are usually steep cliffs.
• pediment—a gently inclined erosional surface carved into bedrock.
• peneplain—the final stage in fluvial or stream erosion.
• potrero—a long mesa that at one end slopes upward to higher terrain.
• tea table—a rock formation that is a remnant of new strata that have eroded away.
• tepui—a tabletop mountain (mesa) found only in the Guayana highlands of South America.
• valley—a depression with predominant extent in one direction.

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