River Sediment Deposition and Mining Quiz
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Questions and Answers

Which process is responsible for the formation of placer deposits of gold, tin ore, and gems such as diamonds or sapphires?

  • Deposition of sediments
  • Weathering of rocks
  • Evaporation of water
  • Transportation by rivers (correct)

    • What can be mined from deposits of pure sand created by rivers?

  • Quartz veins
  • Salt and other chemicals
  • Building materials
  • Silicon for computer chips (correct)

    • What happens to the dissolved chemicals carried by rivers and streams in arid regions?

  • They are evaporated by the Sun (correct)
  • They are used for building materials
  • They are weathered by rocks
  • They are transported to lakes with outlets

    • What type of deposits were the early Australian gold discoveries around Bathurst?

    <p>Placer deposits</p> Signup and view all the answers

    What happens when the speed of a river decreases?

    <p>The river deposits sediment</p> Signup and view all the answers

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