Sep 28, 2019 · etchplain ( plural etchplains ) ( geology, geomorphology) A plain (area of land, not necessarily flat) where bedrock has been subject to extensive etching or subsurface weathering. quotations . 1969, Michael Frederic Thomas, Environment and land use in Africa, page 127: Lateritized etchplains are surfaces of low relief underlain by extensive ...

Etchplain – Plain where the bedrock has been subject to considerable subsurface weathering; Exhumed river channel – Ridge of sandstone that remains when the softer flood plain mudstone is eroded away; Fjord – Long, narrow inlet with steep sides or cliffs, created by glacial activity

Complex Etchplain is an etchplain that has deeply incised valleys that are formed as a result of extreme weathering or the re-weathering of an exposed mantle etchplain. Buried Etchplain refers to one that has been entirely covered by newly formed sediments or by lava. Exhumed Etchplain is an etchplain that has been re-exposed after being buried.

May 08, 2018 · etchplain. oxford. views 2,460,000 updated May 08 2018. etchplain Plain produced in a tropical or subtropical environment as a result of a phase of deep chemical weathering during tectonic stability, followed by one of erosion in which the weathered debris is stripped away. Etchplain relief reflects differences in the resistance of the bedrock ...

The flattish watershed region is part of an ancient etchplain called the African Surface covers large swathes of the continent. While the African Surface occupy the higher ground, spurs and small interfluves a younger "post-African" surface occupy lower positions with occasional rock domes, koppies and tors protruding rolling or plain landscape ...

Other articles where etchplain is discussed: planation surface: Etchplain: Where deep weathering occurs on a landscape, a dichotomy is set up between the thick regolith of weak, weathered rock and the underlying zone of intact rock. If subsequent erosion removes the weathered regolith, then a new planation surface develops through exposure of the…

Etching by goldsmiths and other metal-workers in order to decorate metal items such as guns, armour, cups and plates has been known in Europe since the Middle Ages at least, and may go back to antiquity. The elaborate decoration of armour, in Germany at least, was an art probably imported from Italy around the end of the 15th century—little earlier than the birth of etching as …

Peneplain. Aerial view of the almost flat and drowned peneplain at Belcher Islands, Hudson Bay, Canada, cutting across numerous geologic folds. In geomorphology and geology, a peneplain is a low-relief plain formed by protracted erosion. This is the definition in the broadest of terms, albeit with frequency the usage of peneplain is meant to ...

Weathering is the deterioration of rocks, soils and minerals as well as wood and artificial materials through contact with water, atmospheric gases, and biological organisms.Weathering occurs in situ (on site, with little or no movement), and should not be confused with erosion, which involves the transport of rocks and minerals by agents such as water, ice, snow, wind, waves …