The concave slope form indicates that water does not sink into the ground
(allowing the out-and-down motion of creep), but rather it flows over the surface
in small channels called rills.
indicates the soil creep is the dominant process moving
materials down the slope.
What a great view! Vegetation-covered soil on slopes without evidence of
overland flow (rills and gullies) like these are dominated by slope creep. Wetting
during winer rains pushes the soil outward, and drying allows the soil to move
down the slope with gravity -- as illustrated in the
an external site.
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Using Google Street Views, you are at
(Links to an external site.)Links to an
, South Dakota, virtually. In this view, examine the slopes form. Picture yourself at
the bottom of the ephemeral wash trying to walk up to one of the hillcrests. Do you get the
impression that the slopes are steeper as you go up?
What is the form of that slope and what does it tell you about the dominant process