Podcast
Questions and Answers
How are igneous rocks formed?
How are igneous rocks formed?
- By the cooling of molten magma or lava near, at, or below the Earth's surface (correct)
- By the transformation of preexisting rocks
- By the lithification of inorganic and organic sediments
- By heat and pressure deep below the surface of the earth
What are the primary causes of metamorphism?
What are the primary causes of metamorphism?
- Fold, fracture, and melt
- Magma, lava, and tectonic plates
- Lithification, inorganic sediments, and chemically active fluids
- Heat, pressure, and chemically active fluids (correct)
What can occur during metamorphism?
What can occur during metamorphism?
- Cooling and solidification
- Lithification and sedimentation
- Formation of new sedimentary rocks
- Partial melting to a viscous state and flow (correct)
What changes during metamorphism?
What changes during metamorphism?
What intensities does metamorphism occur along?
What intensities does metamorphism occur along?
How are sedimentary rocks formed?
How are sedimentary rocks formed?
What type of metamorphism occurs when rocks are subjected to both heat and pressure on a regional scale?
What type of metamorphism occurs when rocks are subjected to both heat and pressure on a regional scale?
What are the main sources of heat involved in metamorphism?
What are the main sources of heat involved in metamorphism?
What type of metamorphism occurs when rocks are intruded by magma, resulting in primarily temperature changes?
What type of metamorphism occurs when rocks are intruded by magma, resulting in primarily temperature changes?
Under what conditions does dynamic metamorphism occur?
Under what conditions does dynamic metamorphism occur?
What occurs with igneous activity and the presence of water during contact metamorphism?
What occurs with igneous activity and the presence of water during contact metamorphism?
What provides energy for chemical reactions to proceed during metamorphism?
What provides energy for chemical reactions to proceed during metamorphism?
What two high-pressure minerals are commonly identified in impact craters formed by meteorite collisions?
What two high-pressure minerals are commonly identified in impact craters formed by meteorite collisions?
What is the result of body force during metamorphism?
What is the result of body force during metamorphism?
Study Notes
Igneous Rocks
- Igneous rocks are formed through the cooling and solidification of magma or lava.
Metamorphism
- Primary causes of metamorphism: heat, pressure, and chemically active fluids.
- During metamorphism: mineral composition, structure, and texture of rocks can change.
- Changes during metamorphism: mineral recrystallization, phase changes, and neocrystallization.
- Metamorphism occurs at varying intensities: low-grade, high-grade, and shock metamorphism.
Sedimentary Rocks
- Sedimentary rocks are formed through the accumulation, compression, and cementation of sediments.
Types of Metamorphism
- Regional metamorphism: occurs when rocks are subjected to both heat and pressure on a regional scale.
- Contact metamorphism: occurs when rocks are intruded by magma, resulting in primarily temperature changes.
- Dynamic metamorphism: occurs under high-pressure and high-temperature conditions, typically during mountain building.
Heat Sources and Energy
- Main sources of heat involved in metamorphism: Earth's internal heat, radioactive decay, and tectonic activity.
- Energy for chemical reactions during metamorphism is provided by: heat, pressure, and chemical potential.
Impact Craters and Minerals
- High-pressure minerals commonly identified in impact craters formed by meteorite collisions: coesite and stishovite.
Body Force
- Result of body force during metamorphism: folding and deformation of rocks.
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Description
Test your knowledge about metamorphic rocks and the rock cycle with this quiz. Explore how metamorphic rocks are formed and their role in the rock cycle.
