Differentiate between igneous and metamorphic rocks?
Answers
Answer:
Metamorphic rocks: The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (1500 bars), causing profound physical and/or chemical change. The temperatures were not enough to melt the rock, otherwise, an igneous rock would have formed.
Igneous rock: is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.
Explanation:
Metamorphic rocks: arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock may be a sedimentary rock, an igneous rock or another older metamorphic rock.
Igneous rocks: began as magma (molten rock) which cooled and crystallized into minerals. This magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
Answer:
Metamorphic rocks: arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock may be a sedimentary rock, an igneous rock or another older metamorphic rock.
Igneous rocks: began as magma (molten rock) which cooled and crystallized into minerals. This magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
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