HOW THE FOLLOWING ROCKS ARE FORMED :-
a} sedimentary rock
b} igneous rock
c} metamorphic rock
a) Sedimentary rocks :
Sedimentary rocks are formed by accumulation of sediments, by the deposition of the weathered remains of other rocks,by the deposition of the results of bio genic activity and by precipitation from solution. The sedimentary rock minerals are the result of this sedimentation, which means accumulation of minerals or other particles in layers. These minerals settle down, accumulate and are layered in a horizontal manner.
2) Igneous rocks :
Igneous rocks are formed from the solidification of magma or lava.
3) Metamorphic rocks :
Under great heat and pressure, igneous and sedimentary rocks can change into metamorphic rocks. E.g., Clay changes into slate and limestone into marble
Sedimentary rocks are formed by accumulation of sediments, by the deposition of the weathered remains of other rocks,by the deposition of the results of bio genic activity and by precipitation from solution. The sedimentary rock minerals are the result of this sedimentation, which means accumulation of minerals or other particles in layers. These minerals settle down, accumulate and are layered in a horizontal manner.
2) Igneous rocks :
Igneous rocks are formed from the solidification of magma or lava.
3) Metamorphic rocks :
Under great heat and pressure, igneous and sedimentary rocks can change into metamorphic rocks. E.g., Clay changes into slate and limestone into marble