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14.2.2. Erosion, transport and sedimentation

Transport

The transport is the movement of sediments from where the produced erosion until they are deposited.

Depending on the force of the wind or water and the weight of the transported material, the transport can be carried out by:

  • Crawling or rolling: heavy materials are dragged without lifting them off the ground.
  • Saltation: small particles rise and fall again.
  • Suspension: air or water transport very fine particles that do not settle on the ground.
  • Dissolution: materials are transported dissolved in water.

Mecanismos de transporte de partículas

By NASA [Public domain], via Wikimedia Commons

Sedimentation

The sedimentation  occurs when the carrying agent has less energy sediments and deposits the transported materials.

Each geological agent produces a characteristic type of sedimentation, which is why we can distinguish different sedimentary structures in sediments.

Materials accumulate, by the force of gravity, in sunken areas, sedimentary basins, where sediments can be transformed into sedimentary rocks through diagenesis.

Answer in your notebook

14.5.- What is the reason why the boulders are rounded?


         

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Biology and Geology teaching materials for Compulsory Secondary Education (ESO) and Baccalaureate students.