1. alluvial fan or delta
Wikipedia definition
2. Alluvial fanAn alluvial fan is a fan-shaped deposit formed where a fast flowing stream flattens, slows, and spreads typically at the exit of a canyon onto a flatter plain. A convergence of neighboring alluvial fans into a single apron of deposits against a slope is called a bajada, or compound alluvial fan.
Read “Alluvial fan” on English Wikipedia
Read “扇状地” on Japanese Wikipedia
Read “Alluvial fan” on DBpedia


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