CHANGING TAMILNADU COAST

N.Nandhivarman , General Secretary Dravida Peravai

 Tamils lack sense of history. This inherent ingredient of the Tamil people is responsible for lack of recorded history at the time when every country woke up to construct its history on facts. We have to mainly depend on the literary evidences to write our history. The epic Silapathigaram gave us an insight into the landmass that is lost in the Indian Ocean.

Now we have other sources to confirm our literary references. With the knowledge explosion, thanks to the internet revolution, we get lot of information. To understand the past history of the Tamils inclusive of Pondicherry and to foresee its future we have to know about continental drifts and the theory of plate tectonics.

"The theory of continental drift that the continents move relative to one another was proposed by Alfred Wegener in 1910. It was not until 1945 that Arthur Holmes suggested a mechanism for the process-convection in the mantle. Complete evidences to convince more scientists those plate tectonics the movement of larger segments of the outermost shell of the earth as a mosaic of large rigid plates was not accomplished until the 1960's...."

The Department of Geological Sciences of the Canadian University of Saskatchewan in its web pages states that Plate Tectonics is the unifying theory that explains almost all the processes at work on the planet. To understand the evolution of our planet and to have a coherent idea on earthquakes, volcanoes, mountain belts, ocean basins and the topography of the sea floor, scholars are relying on the theory of plate tectonics.

Alfred Wagener known as the Father of Continental drift in his publication of 1912 said that " Looking at a global map it would appear that the continents could be brought together to fit like a jig saw puzzle" Mankind is one and this stands proven once again by the geological fact that continents were together at one time and drifted apart. Now everyone accepts that as solid upper Earth floats on astheno-sphere, the litho-sphere drifts".

The Earths crust since its formative years dating back to 4.6 million years is in constant motion. "Broken into a patchwork of plates and floating on currents in the fluid visco-plastic upper mantle beneath, the plates continuously collide and pull apart. The continental crust is significantly less dense than either oceanic crust or the upper mantle rocks. Some more proofs are given below.

                        

The formation of Himalayan Mountains is due to the fact that Indian sub continent moving northwards buckling up material while colluding with the Asian continent. The scientists of the Earth Observatory of Columbia University New York confirm that the Indo-Australian plate south of Equator in the Indian Ocean area has broken into two and each is moving in one direction. In the last 50 million years Indian sub continent is drifting at 5 centimeters a year towards North. Tibetan plateau and Himalayas bear the brunt of this mounting pressure. The Altyn Tagh fault i.e. geo-fracture extends 2200 kilometers in Western China...........