define Metamorphic
define Metamorphic
Answers
Answer:
Metamorphic rocks arise from the transformation of existing rock to new types of rock, in a process called metamorphism. The original rock is subjected to temperatures greater than 150 to 200 °C and, often, elevated pressure of 100 megapascals or more, causing profound physical or chemical changes.
Answer:
Metamorphic rocks are formed from other rocks that are changed because of heat or pressure. They are not made from molten rock – rocks that do melt form igneous rocks instead. Earth movements can cause rocks to be deeply buried or squeezed.
change of shape
The name metamorphic comes from Greek words meaning “change of shape.” Metamorphic rock can be formed from sedimentary or igneous rocks. Studying chemicals that make up metamorphic rock can reveal the original rock type.