Monday, December 9, 2013

Transport

Transport is the movement of materials from one place to another thanks to the external geological agents.

It can be:
  • Selective: The transfer depends on the size of the materials and the energy of the agents (wind and water).
    • Rivers can transfer solid materials in different ways:
      • Flotation: The less dense materials.
      • Suspension: Equal density of water or a similar one.
      • Saltation: It´s not a continous flow. The water will push the materials.
      • Dissolution: The material dissolves and when the water disappears, it precipitates.
      • Rolling or sweeping along: When it´s a round material

    • Wind: Its transport ability is much lower than water, but in suspension it can transfer materials in big distances and spread them much further than water.



  • Non-selective: Transport does not depend on materials sizes.
    • Ice (glacier): Doesn´t allowed the materials touch the ground so everything is transport with the same speed, and when the ice melts, everything is deposited in the same way.



    • Water (torrents): When the water strength is very big there´s no difference in size.

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