Eroded alluvial terraces, Alaska

Eroded alluvial terraces, Alaska

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Credit: DR JUERG ALEAN/SCIENCE PHOTO LIBRARY

Caption: Eroded alluvial terraces. View of alluvial (fluvial) terraces that have been eroded over time. Alluvial terraces are the remnants of earlier floodplains that existed at a time when either a stream or river was flowing at a higher elevation before its channel cut down to create a new floodplain at a lower elevation. They flank the sides of floodplains and fluvial (river) valleys, and consist of a strip of land called a 'tread', separated from either an adjacent floodplain, other alluvial terraces, or uplands, by distinctly steeper strips of land called 'risers'. Photographed in the Matanuska Valley, Alaska, USA.

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Keywords: alaska, alaskan, alluvial terrace, american, channel, earth science, eroded, erosion, floodplain, floodplains, fluvial, geographical, geography, geological, geology, hydrological, hydrology, landform, landscape, matanuska valley, nature, north america, physical geography, riser, risers, river, stream, terraces, terrain, tread, treads, united states, us, usa, water, weathered, weathering

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