Fluvial landforms

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Alluvial fans

  • alluvial fans are cone shaped fans of alluvium that is deposited at the end of a mountain valley on the lowlands.
  • this happens because once a river leaves a mountain valley it is no longer confined to the valley so it is able to spread laterially, this causes it to loose energy and deposit material where it spreads out at the enterence to lowland areas
  • A Bajada is where multiple mountain valleys emerge  creating several alluvial fans that merge together to form one continuous alluvial fan.

Playas

  • formed when rivers drain into shallow basins that form temporary lakes or playas
  • salt is carried in solution by rivers (salt accumilates in areas…

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