Carbonate Mud in Sedimentary Rocks
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Questions and Answers

What is the equivalent of carbonate mud in terrigenous rocks?

  • Sand
  • Quartz
  • Aragonite
  • Clay (correct)
  • What are the needle-shaped crystals dominant in modern lime mudstone environments made of?

  • Calcite
  • Quartz
  • Aragonite (correct)
  • Feldspar
  • What size range do the micrite crystals typically fall within?

  • 1 to 4 cm
  • 1 to 4 mm
  • 4 to 8 um (correct)
  • 8 to 12 um
  • What minerals can lime mudstone contain in small amounts?

    <p>Clay minerals</p> Signup and view all the answers

    How does SEM studies describe the micrite in carbonate mud?

    <p>With areas of finer and coarser crystals</p> Signup and view all the answers

    What is the main mineralogy of modern marine shelf carbonate mud?

    <p>Aragonite and high-Mg calcite</p> Signup and view all the answers

    What does the presence of sparry calcite cement in intergranular pore spaces indicate?

    <p>Deposition under agitated-water conditions</p> Signup and view all the answers

    What process produces lime mud in variable or limited quantities?

    <p>Biochemical precipitation through microbial photosynthesis and decomposition</p> Signup and view all the answers

    What does the presence of micrite in an ancient limestone commonly indicate?

    <p>Deposition under quiet-water conditions</p> Signup and view all the answers

    What is the main composition of cement infill of primary porosity (intergranular)?

    <p>Sparite-sparry calcite</p> Signup and view all the answers

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