etchplain

An etchplain is a geological feature characterized by a low-relief plain that cuts across varied rocks and structures. This type of surface is formed through deep weathering processes, where the landscape is deeply eroded, and then subsequent erosion removes the weathered material, exposing an old weathering front. This process often results in the exposure of resistant rock compartments, essentially etching a subsurface landscape from the rock.1

Etchplanation is particularly characteristic of ancient, stable continental areas. Deep weathering, often tropical laterization, occurred over long geological periods. Great planation surfaces developed as tectonic factors influenced the periodic removal of weathered products. These surfaces are distinct from other types of landforms, which can be created by tectonic movements, erosion, or even biological activity. Plains, in general, are relatively level areas with gentle slopes and small local relief, found on all continents and often becoming major centers for population and industry due to their cultivable land and ease of transportation.123