Questions and Answers
Which of the following is NOT an example of a metamorphic rock?
How do temperature and pressure influence the formation of metamorphic rocks?
What are igneous rocks primarily formed from?
Which factors determine the type of igneous rock formed?
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What is the term used for magma that reaches the Earth's surface?
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How do intrusive igneous rocks form?
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What is the texture of extrusive igneous rocks, and why do they have that texture?
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Study Notes
Formation of Metamorphic Rocks
- Metamorphic rocks originate from existing rocks that undergo transformation.
- Heat, pressure, and chemical reactions are the primary agents of change in the metamorphic process.
- These conditions alter the texture, mineral composition, and physical properties of the original rock.
Key Characteristics
- Texture changes can include foliation or a banded appearance depending on the pressure conditions.
- Mineral composition may evolve to form new minerals that were not present in the original rock.
- Physical properties such as hardness and density are often enhanced through metamorphism.
Examples of Metamorphic Rocks
- Marble is formed from limestone and is primarily composed of calcite.
- Slate originates from shale, displaying excellent cleavage properties and is often used in roofing and flooring.
- Gneiss is characterized by its banded appearance and is typically formed from granite or sedimentary rock under intense heat and pressure.
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Description
This quiz provides insights into metamorphic rocks, focusing on their formation due to heat, pressure, and chemical reactions. Understand the changes in texture, mineral composition, and physical properties through examples like marble, slate, and gneiss.
