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Rocks formed as a result of the transformation of an existing rock due to heat and pressure are:
- a)Metals
- b)Igneous rocks
- c)Metamorphic rocks
- d)Sedimentary rocks
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
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Rocks formed as a result of the transformation of an existing rock due...
Answer:
Explanation:
Metamorphic rocks are formed as a result of the transformation of an existing rock due to heat and pressure. Here is a detailed explanation:
1. Metamorphic Rocks:
- Metamorphic rocks are rocks that have undergone changes in their mineralogy, texture, or chemical composition due to heat and pressure.
- These changes occur deep within the Earth's crust where the rocks are subjected to high temperatures and pressures.
- Examples of metamorphic rocks include marble, slate, gneiss, and quartzite.
2. Formation of Metamorphic Rocks:
- Metamorphic rocks are formed from pre-existing rocks, which can be igneous, sedimentary, or even other metamorphic rocks.
- The existing rock, called the parent rock or protolith, undergoes changes in response to heat and pressure.
- The heat and pressure cause recrystallization of minerals, resulting in the formation of new minerals and a change in the rock's texture and structure.
- The transformation can occur due to regional metamorphism (large-scale tectonic forces) or contact metamorphism (localized heating by a nearby magma intrusion).
3. Distinguishing Features:
- Metamorphic rocks often exhibit foliation, which is a parallel alignment of minerals or mineral bands.
- They can also contain minerals that are not found in the parent rock.
- The texture of metamorphic rocks can range from fine-grained to coarse-grained, depending on the degree of metamorphism.
In conclusion, rocks formed as a result of the transformation of an existing rock due to heat and pressure are called metamorphic rocks.
Explanation:
Metamorphic rocks are formed as a result of the transformation of an existing rock due to heat and pressure. Here is a detailed explanation:
1. Metamorphic Rocks:
- Metamorphic rocks are rocks that have undergone changes in their mineralogy, texture, or chemical composition due to heat and pressure.
- These changes occur deep within the Earth's crust where the rocks are subjected to high temperatures and pressures.
- Examples of metamorphic rocks include marble, slate, gneiss, and quartzite.
2. Formation of Metamorphic Rocks:
- Metamorphic rocks are formed from pre-existing rocks, which can be igneous, sedimentary, or even other metamorphic rocks.
- The existing rock, called the parent rock or protolith, undergoes changes in response to heat and pressure.
- The heat and pressure cause recrystallization of minerals, resulting in the formation of new minerals and a change in the rock's texture and structure.
- The transformation can occur due to regional metamorphism (large-scale tectonic forces) or contact metamorphism (localized heating by a nearby magma intrusion).
3. Distinguishing Features:
- Metamorphic rocks often exhibit foliation, which is a parallel alignment of minerals or mineral bands.
- They can also contain minerals that are not found in the parent rock.
- The texture of metamorphic rocks can range from fine-grained to coarse-grained, depending on the degree of metamorphism.
In conclusion, rocks formed as a result of the transformation of an existing rock due to heat and pressure are called metamorphic rocks.
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Rocks formed as a result of the transformation of an existing rock due to heat and pressure are:a)Metalsb)Igneous rocksc)Metamorphic rocksd)Sedimentary rockse)None of theseCorrect answer is option 'C'. Can you explain this answer?
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