Phosphorite Formation Quiz
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Questions and Answers

What color is the skeletal phosphate in thin section?

  • Reddish orange
  • Pale white
  • Dark green
  • Light yellow to brown (correct)

    • What may nucleate around grains during the diagnosis of bone fragments?

  • Silica crystals
  • Gypsum formations
  • Colloph-ate nodules (correct)
  • Calcium carbonate deposits

    • What process results in the formation of bone beds with fish scales?

  • Chemical precipitation of phosphorites
  • Concentration of vertebrate skeletal fragments (correct)
  • Erosion and weathering of bedrock
  • Volcanic activity

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