Petrology and Classification of Rocks

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Questions and Answers

What is petrology concerned with?

  • The study of soil composition
  • The compositions, structures, and origins of rocks (correct)
  • The classification of sedimentary rocks
  • The formation of igneous rocks

Which type of rock is formed through the cooling and solidification of lava or magma?

  • Conglomerate rocks
  • Igneous rocks (correct)
  • Sedimentary rocks
  • Metamorphic rocks

What process forms sedimentary rocks like sandstone and limestone?

  • Compaction and cementation (correct)
  • Weathering and erosion
  • Volcanic activity
  • Intense heat and pressure

What type of rock is formed from other rocks that are changed by intense heat and pressure underground?

<p>Metamorphic rock (A)</p> Signup and view all the answers

Where is sandstone found?

<p>River and stream beds, beaches, deserts, and underwater (D)</p> Signup and view all the answers

What is the main source of the material lime?

<p>Limestone (B)</p> Signup and view all the answers

What is the main constituent of oolitic limestone?

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

What distinguishes shale from other mudstones?

<p>It is fissile and laminated (C)</p> Signup and view all the answers

Where is conglomerate commonly found?

<p>Beaches, riverbeds, and glaciers (D)</p> Signup and view all the answers

Which rock is composed almost entirely of quartz?

<p>Quartzite (A)</p> Signup and view all the answers

What type of limestone forms as a result of precipitation evaporation?

<p>Travertine (A)</p> Signup and view all the answers

What is the characteristic appearance of breccia?

<p>Large angular fragments cemented together (B)</p> Signup and view all the answers

What type of rock is gneiss?

<p>Metamorphic rock (B)</p> Signup and view all the answers

What distinguishes coquina from other types of limestone?

<p>It is poorly cemented limestone (B)</p> Signup and view all the answers

What type of sedimentary rock is shale?

<p>Clastic sedimentary rock (C)</p> Signup and view all the answers

What event could lead to the formation of breccia?

<p>Landslides and mudslides at the base of mountains (B)</p> Signup and view all the answers

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