Question

ii) What are metamorphic rocks?
Pg no​

Answer 1

$\huge\sf\underline\red{Answer\:⟹}$

Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock is subjected to heat and pressure, causing profound physical or chemical change. The protolith may be a sedimentary, igneous, or existing metamorphic rock.

Answer 2

Answer:

The original rock, or protolith, is subjected to heat and pressure which cause physical, chemical and mineralogical changes to the rock. Protoliths may be igneous, sedimentary or pre-existing metamorphic rocks.

Metamorphic rocks are formed within the Earth’s crust. Changing temperature and pressure conditions may result in changes to the mineral assemblage of the protolith.

Metamorphic rocks are made by either heating up or squashing the earth's crust. They are often found in mountainous regions. One example is slate. Slate was originally a black mud laid down on the bottom of the sea or lake. Fossils can sometimes be found in it but they are often squashed. Other common metamorphic rocks are called marble, gneiss, schist.

Hope it helps