Metamorphic rocks are rocks thathave become changed by intense heat or pressure while forming. In the very hot and pressured conditions deep inside the Earth's crust, both sedimentary and igneous rocks can be changed into metamorphic rock. ... They change from being squashy to rock hard. What...
Metamorphic rocks form beneath the surface of the earth. They change from the intense heat and pressure. ... Butif the lava cools slowly, the rocks will have plenty of texture, gas bubbles, tiny holes and spaces. This type of rock is made out of sand, shells, pebbles and other material...
Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot, mineral-rich fluids or, more commonly, some combina...
Metamorphic rock, any rock that results from the alteration of preexisting rocks in response to changing conditions, such as variations in temperature, pressure, and mechanical stress, and the addition or subtraction of chemical components. The preexisti