alluvial

There were fat ones that were completely symmetrical, and others that were huge and flat, like alluvial fans.

He crunched across alluvial soil in scuffed sneakers.

The forested ridges catch rain, and water percolates into the canyon’s alluvial soil, where the trees’ roots tap into shallow groundwater.

From Zabriskie Point, visitors can survey a wonderland of rock formations and alluvial flow, and it’s just about impossible to tell what happened last week from what happened last century.

“The weaker alluvial sediments can amplify shaking, and mountains are vulnerable to landsliding, including along the roads that lead to mountain villages.”