Metamorphic rocks are the third major type of rock, the other two being igneous and sedimentary. Because of how they are formed, metamorphic rocks constitute a great deal of the bedrock in Earth's crust. read more
The types of rocks are: Igneous. Sedimentary. Metamorphic. Igneous. - are formed from melted rock (lava/magma) that has cooled and solidified. - when magma cools slowly, crystals grow from the molten liquid, and a coarse-grained rock forms. read more
Metamorphic rocks are the third major type of rock, the other two being igneous and sedimentary. Because of how they are formed, metamorphic rocks constitute a great deal of the bedrock in Earth's crust. Many precious materials, such as marble and many types of gemstones, including diamonds, are formed by the metamorphic process. read more
The characteristics of metamorphic rock are that some contain layers and streaks of different colors and textures caused by different minerals. Other metamorphic rocks are more uniform in color and texture and have minerals arranged in parallel layers. Continue Reading. read more