Erosional Landforms

Streams in arid regions are different from those in humid climates.

Most streams are intermittent and many have braided channels.

Deep canyons in dry climates usually have near-vertical walls and box-like profiles.

Where rivers traverse and cut  horizontal layers, cliff-and-bench topography develops. More resistant layers = steep slopes; weaker = gentle slopes (e.g., Colorado Plateau).

Plateaus: comparatively flat upland areas formed in regions of horizontal rock layers. The plateau becomes dissected by rivers and distinctive landforms are produced.
Mesa: a generally flat-topped area, bounded by cliffs, that is quite a bit wider (usually) than it is high.
Buttes: smaller, flat-topped landforms isolated by erosion.  They are more or less as wide as they are high.
Monuments (or spires): slender features that are much higher than they are wide.

Where the bedrock is not horizontal, rugged mountain ranges are separated by valleys with flat floors. In the Basin and Range province of the western USA, mountains are uplift along faults.

A sharp break in slope marks the mountain front.
Piedmont: the gentle valleyward slope from the mountain front. It consists of the bajada and the pediment.
Bajada: formed by deposition.
Pediment: gently sloping erosional surface that cuts across bedrock, and typically has a thin veneer of sediment on its surface. It is thought that the pediment develops as the mountain front retreats.
Inselbergs: erosional remnants that form isolated hills on the pediment.