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Types of Phosphorite Deposits
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Types of Phosphorite Deposits

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Questions and Answers

What are bioclastic phosphorites composed largely of?

  • Peloids and coids
  • Pebbles and limestone fragments
  • Vertebrate skeletal fragments (correct)
  • Phosphatic grains and pellets

    • What is the internal structure of nodular phosphates?

  • Composed of phosphatic nodules
  • Spherical to irregular-shaped nodules
  • Mechanically concentrated by reworking of earlier-formed phosphate deposits
  • Homogeneous (structureless) to layered or concentrically banded (correct)

    • What forms guano deposits?

  • Carbonaceous mudrocks, cherts, and carbonate rocks
  • Excrement of birds and possibly bats that has been leached to form an insoluble residue of calcium phosphate (correct)
  • Phosphatized fossils and skeletal fragments
  • Peloids, coids, pisoids

    • What composes pebble-bed phosphorites?

    <p>Phosphatic nodules, phosphatized limestone fragments, or phosphatic fossils</p> Signup and view all the answers

    3

    <p>3.1</p> Signup and view all the answers

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