Abstract

The several observations and scientific evidence suggests that the Earth at present has a layered structure But the question arises how the layered structure of Earth has taken the present shape from the early Earth which was a product of condensation from the solar nebular The Solar System is presumed to have begun after one or more local supernova explosions about 4 6 Ga ago The planetesimals began to attain the proportions of planetary embryo as a result of collisions between them The heat generated from the collisions must have melted substantial amount of the early planet resulting in the formation of a global magma ocean and the denser refractory material which could not melt sank inwards This discussion aims at illucidating the driving forces and the processes within the Earth which resulted in the present layered structure of Earth