Wainwright performed experiments at Walnut Gulch to observe the speed at which it could be re-established following disturbances.
Wainwright performed experiments at Walnut Gulch to observe the speed at which it could be re-established following disturbances. Due to an inability to accumulate silt, large volcanic pyroclasts are unable to form it. Developed by eolian deflation, it is often formed in regions close to bedrock or on parts of alluvial fans. Exposed regions of it with little iron can be covered with a dark surface known as varnish. It occurs when sand is blown away and only very small rocks remain, such as pebbles and cobbles. For 10 points, name this substance of closely packed and flat rock fragments in an arid environment.
Wainwright performed experiments at Walnut Gulch to observe the speed at which it could be re-established following disturbances.
{desert pavement}