THE ROCK CYCLE
The earth is
constantly changing and this happens in a cyclic manner known as the Rock
cycle. This continuous process has neither a start nor an ending. High
temperature and pressure deep inside the crust melts the crustal rocks. As a
result the magma rises and it either intrudes into existing rock material or
extrudes out of earth surface in the form of lava producing both Igneous and
Metamorphic Rocks. The exposed rocks are affected by weathering and erosion.
Then deposition of this eroded material produces sedimentary rocks. The crustal
force pushes Sedimentary, Igneous and Metamorphic rocks deep in the crust and
if they reach lowest levels in the crust will be melted again and a new cycle
will begin again and will continue in this manner.
