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Alluvial Fan (Geoform Type)

Component: Geoform

Unique Identifier: 90

Geoform Origin Geologic
Geoform Fan
Geoform Type Alluvial Fan

Definition A low, outspread, relatively flat (or gently sloping) mass of loose rock material, shaped like an open fan or a segment of a cone. The rock material was deposited by flowing water where it issues from a narrow valley or where the gradient abruptly changes. Alluvial fans are usually steeper than the surrounding surface.