What are the chief characteristics of metamorphic rocks?
Answer
Metamorphic rocks are composed of fine particles and dense, smooth material. These are very precious rocks, particularly for building stones like marble, garnet, slate quartzite etc.
Main causes are great temperature and pressure beneath the earth’s crust, which changes the original texture and form of the rocks into dense, crystalline and fine grained rocks.
Explain this term associated with rocks: Lithification of Rocks.
Answer
It is the process of turning the loose material into hard rock, which helps in the formation of the sedimentary rocks found in different layers one upon another.
Lava : Lava is the black molten material erupted in a volcano. Magma : Magma is the compound of lava, stones, ash, debris etc. erupting out in a volcano.