How metamorphic rock is formed?

Answer 1

Metamorphic rock is formed from pre-existing igneous or sedimentary rocks in a variety of ways. Most metamorphic rock is formed at depths of more than two miles and anywhere up to 70 miles.

At these depths the weight of overlying rock exerts tremendous pressures, and with increasing depth, temperature increases dramatically. The crushing weight and high temperatures alter the alignment of minerals, or, can even change pre-existing minerals into new minerals. Metamorphic rock is commonly formed at crustal plate collision zones, which provide additional pressures and accompanying increases in temperatures.

Let's be clear--the rock which is undergoing metamorphism does not melt--if it did, and then solidified, it would be an igneous rock. Parent rock can also be metamorphosed by being in close proximity of magmatic intrusions. Exposure to the high temperatures causes the minerals in the parent rock to recrystallize. This is called contact metamorphism.

Answer 2

The answer is not that hard so u may be now it all it is

Metamorphic rocks are rocks that have "morphed" into another kind of rock. These rocks were once igneous or sedimentary rocks. How do sedimentary and igneous rocks change? The rocks are under tons and tons of pressure, which fosters heat build up, and this causes them to change. If you exam metamorphic rock samples closely, you'll discover how flattened some of the grains in the rock are

Answer 3

Metamorphic rock is formed from existing rock that is subjected to high heat, pressure, or chemically active fluids. This causes the minerals within the rock to recrystallize and rearrange, forming new textures and structures, without completely melting the rock. Examples of metamorphic rocks include marble, slate, and quartzite.

Answer 4

Metamorphic rocks are formed by Igneous rocks being exposed to extreme heat and pressure