How is a pediment different from an alluvial fan?
Pediments are broad, gently sloping surfaces of eroded bedrock leading up to a steep bedrock face. They are left behind as the bedrock face retreats. Alluvial fans are steeper deposits localized at the mouth of canyons in mountainsides. Some alluvial fans contain debris flow deposits, but most are made of strongly sorted clasts. In either case, material moves downslope and out from the canyon.
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Indicate whether the statement is true or false
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