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 (D)</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 (C)</p> Signup and view all the answers

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

<p>Aragonite and high-Mg calcite (A)</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 (B)</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 (A)</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 (D)</p> Signup and view all the answers

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

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

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