(i)These rocks do not have particles and layers.
(ii)These rocks are compact and massive.
(iii)These rocks are crystalline.
(iv)The igneous rocks are extremely hard and resistant.
(v)These rocks do not possess fossils of plants or animals.
(vi)These rocks are thermal in origin.
Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water.
(i)The layers of deposits : Loose materials or sediments are deposited in the layers.
A metamorphic rock is a type of rock which has been changed by extreme heat and pressure.
The types of metamorphic rocks depend upon the original rocks that were subjected to metamorphism. Metamorphic rocks are classified into two major types:
(i)foliated rocks
(ii)non-foliated rocks
Formation of metamorphic rocks : These rocks are formed due to thermal metamorphism.
It is of two types :
(i)Contact metamorphism: In contact metamorphism the rocks come into the contact with hot magma and lava and the rock material is recrystallized under high pressure and temperature.
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