An arroyo is a steep-sided valley produced by ____________.

Question

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Arroyos are formed by the scouring effect of water and sediment during flash floods. The fast-moving water erodes the soil and rock, creating a steep-sided valley. Wind erosion (option B) can also create valleys, but they are typically not as steep-sided as arroyos. Normal faulting (option A) is a type of tectonic activity that creates valleys, but they are not typically associated with arroyos. Cliff retreat (option D) is a process by which waves erode cliffs along coastlines, but this is not applicable to arroyos.

An Arroyo Is a Steep-Sided Valley Produced by ____________