Bajadas or piedmont alluvial plains form when a series of adjacent alluvial fans coalesce into one feature. These broad plains may extend for several miles away from the mountain range. Bajadas differ from pediments in being surfaces of deposition rather than erosion. The term is usually applied to semiarid and desert regions.
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Pediment Cross-section Burchfield, B. Clark; Foster, Robert; Keller, Edward; Melhorn, Wilton; Brookins, Douglas; Mintz, Leigh; Thurman, Harold.
Physical Geology.
Charles E. Merrill Publishing Co., 1982.