Brief notes on Igneous, Sedimentary , Metamorphic rocks. Deep below the lithosphere, is a mass of hot, molten rock material. This is known as magma. Magma solidifies under various conditions to form igneous rocks. Ignis is the Latin word for fire.
Phosphorus, calcium and magnesium are components of the sedimentary cycle. Sulphur is to some extent intermediate, since two of its compounds hydrogen sulphide and sulphur dioxide formed under some circumstance, add a gaseous component to its normally sedimentary cycle.
Rocks are made up of different combination of minerals. According to their conditions of formation, rocks are of three types. Sedimentary rocks are formed when layers of rock pieces and eroded soil get squeezed together. These rocks are generally formed under water. As the rivers rush to the sea, they pick up mud, sand and pebbles and carry them along.