Question

for igneous and sedimentary rocks to convert into metamorphic rocks , do both of them need to be converted together?​

Answer 1

Answer:

Metamorphic rocks: form by recrystallization of either igneous or sedimentary rocks. This happens when the temperature, pressure or fluid environment change and a rock changes its form (e.g. limestone turns to marble). The range of temperatures for metamophism is 150C up to the melting temperature.

Answer 2

Igneous rocks: Most of the earth is covered with igneous rocks. They are formed by cooling and hardening of molten rocks. Magma (or molten rocks) in the interior of the earth is pushed upwards by other rocks.

Sedimentary rocks: All rocks on the earth surface slowly break down into smaller pieces these small pieces are called sediments.

Metamorphic rocks: The rocks which are formed by the action of heat and pressure are called metamorphic rocks.