Question
Which of the following are the reasons for the formation of metamorphic rocks?
Select the correct answer using the codes given below.
- High temperatures and pressures at depth cause changes in mineralogy, texture and composition.
- Changes take place in the solid-state by crystallisation and chemical reactions.
- Temperatures are greater than 150°, less than 400°.
Select the correct answer using the codes given below.
Answer: Option B
Answer: (b)
Metamorphic rock is any sedimentary or igneous rock that has been changed or morphed, because of pressure and heat.
High temperatures and pressures at depth cause changes in mineralogy, texture and composition.
Changes take place in a solid-state by recrystallisation and chemical reactions.
Temperatures were greater than 250°, less than 700°.
Regional Metamorphism - High pressures and temperatures derive from regional collision, deformation and mountain building.
Contact Metamorphism - Locally high temperatures, adjacent to intrusions.
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Answer: (b)
Metamorphic rock is any sedimentary or igneous rock that has been changed or morphed, because of pressure and heat.
High temperatures and pressures at depth cause changes in mineralogy, texture and composition.
Changes take place in a solid-state by recrystallisation and chemical reactions.
Temperatures were greater than 250°, less than 700°.
Regional Metamorphism - High pressures and temperatures derive from regional collision, deformation and mountain building.
Contact Metamorphism - Locally high temperatures, adjacent to intrusions.
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