Metamorphic Rocks and Their Formation
8 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary factor that contributes to the formation of metamorphic rocks?

  • Volcanic activity
  • Pressure and temperature (correct)
  • Sedimentation
  • Chemical weathering
  • Which of the following changes is primarily associated with the metamorphic process?

  • Color changes
  • Chemical composition changes
  • Textural changes (correct)
  • Biological changes
  • What is foliation in metamorphic rocks primarily caused by?

  • Uniform stress application
  • Cooling of lava
  • Differential stress (correct)
  • Chemical reactions
  • What type of metamorphism involves high pressure and temperature over large areas?

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

    Which metamorphic rock transformation involves the addition and subtraction of elements?

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

    What is a characteristic feature of migmatites?

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

    Which type of metamorphism is prevalent at the contact point between magma and surrounding rock?

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

    Which of the following is NOT a characteristic of the metamorphic process?

    <p>Complete melting of minerals (C)</p> Signup and view all the answers

    Study Notes

    Metamorphic Rock Formation

    • Metamorphic rocks form when existing rocks change under pressure, temperature, and subterranean fluids.
    • Rocks remain solid during metamorphism.
    • Changes affect texture, mineralogy, or both.

    Metamorphic Rock Changes

    • Changes in pressure and temperature have minimal compositional changes, mostly textural.
    • Volatiles like water and carbon dioxide are lost.
    • Changes due to fluids include addition or removal of elements, or both (metasomatism).

    Metamorphic Limits

    • Changes occur while rocks remain solid.
    • Migmatites have partial melting resulting in segregation of the initial material.
    • Leucosome (acidic composition) and Melanosome (basic composition) are formed.

    Temperature-Driven Metamorphism

    • The transformation from limestone to marble involves rock recrystallization.

    Pressure-Driven Metamorphism

    • Mostly caused by tectonic stress.
    • Differential stress aligns minerals perpendicular to the direction of stress.
    • This forms foliation or layering in metamorphic rocks.

    Foliation in Metamorphic Rocks

    • Folded gneiss with significant pressure and relatively low temperatures.
    • Folded schist with significant pressure and relatively low temperatures.

    Types of Metamorphism

    • Three main types: Regional, Contact, and Burial.

    Regional Metamorphism

    • Barrovian type.

    Contact Metamorphism

    • Buchan type.

    Burial Metamorphism

    • Occurs with increasing depth and pressure.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Related Documents

    Description

    Explore the fascinating process of metamorphic rock formation in this quiz. Understand how pressure, temperature, and fluids lead to changes in texture and mineralogy without altering the solid state of the rocks. Test your knowledge on various metamorphic processes and rock types like migmatites and marble.

    More Like This

    Use Quizgecko on...
    Browser
    Browser