The lowest part of most bolsons is occupied by a landform called playa

The lowest part of most bolsons is occupied by a landform called playa. Which category of landform formation does it represent ?

Fluvial landforms
Arid landforms
Glacial landforms
Periglacial landforms
This question was previously asked in
UPSC NDA-2 – 2024
Bolsons are internally drained basins characteristic of arid and semi-arid regions, particularly in the Basin and Range topography of the United States. The lowest part of a bolson is often a playa, which is a flat, dry lakebed that forms when ephemeral lakes evaporate. Both bolsons and playas are landforms shaped by processes dominant in arid environments, including intermittent fluvial action (during rainfall) and significant evaporation. They are classic examples of Arid landforms. Fluvial landforms are shaped by permanent rivers. Glacial landforms are shaped by glaciers. Periglacial landforms are associated with cold climates near glacial margins, involving processes like frost heave and solifluction.
Playas are flat-bottomed depressions found in internally drained basins (bolsons) in arid regions, formed by the accumulation and subsequent evaporation of water.
Playas can accumulate evaporite minerals like salt, gypsum, or borax, depending on the dissolved load carried by the water. Famous examples include the Bonneville Salt Flats in the USA and Etosha pan in Namibia.
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