Plate Boundaries Plate boundaries are the surface trace of the zone of motion between two plates. Depending upon the movement of tectonic...

In our Previous articles, we discussed the major theories proposed at different times regarding the distribution of Oceans and...

In our Previous article, we discussed a few major theories proposed at different times regarding the distribution of Oceans and...

The relative position of landmass and ocean basins is referred to as the distribution of continents and oceans. The movements of tectonic...

The Mantle The mantle is the second major part of the earth, it is the source region of most of the earth’s internal energy and is...

The Crust The crust is the uppermost shell of the earth. It is 5-10 km thick over the oceanic area, 35 km in the continental area, and...

It is not possible to know about the earth’s interior by direct observations because of the huge size and the changing nature of its...

Earlier Theories Nebular Hypothesis (1755) Planetesimal Hypothesis (1904) Gaseous Tidal Hypothesis (1925) Double Star Hypothesis (1938)...