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Unknown Story
Updated: 2/24/2020
Unknown Story
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Storyboard Text

  • Before
  • Valley Formation
  • I infer that a valley is formed by physical weathering. The river flow gradually slices through the land (physical weathering), creating a valley. The weathered material gets carried by the river (erosion) and into a river delta.
  • After
  • Before
  • River Delta Formation
  • I infer that a river delta is formed by water erosion. The river carries sediment away (water erosion), and gets deposited near the ocean or a lake. The sediment is from valleys the river goes through and carries away. It takes a long time for sediment to erode and build up into a river delta.
  • After
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