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Abstract

The author considers that the prevalent views on origin of ocean basins and ocean water are inconclusive and vague and cannot be justified by scientific principles. Both the concepts of plate tectonics and continental drift conceive that oceans are of great geological antiquity while Hilgenberg�s model of Earth expansion endorses that initially the planet was considerably small and devoid of oceans. Based on Hilgenberg�s model of Earth expansion, the author considers that since the primordial Earth was devoid of oceans, at that stage the ocean-forming water must have been associated with the mantle, thereby turning that geosphere considerably fluid. Such semi-fluid mantle must have been pre-eminently suitable for planetary expansion, owing to swelling up in response to an external gravitational pull caused by an extra-terrestrial planetary body, probably the Moon. The primordial Earth was completely covered with a relatively thin granitic layer which, due to swelling up and uplifting of the mantle developed a number of long and sinuous expansion cracks forming several continental fragments. Through these expansion cracks widespread disgorge of molten magma took place which deposited on both sides of the cracks forming the floors of the oceans. With continued expansion, caused by gravitational attraction of the external planetary object the dimension of the oceans broadened while the expansion cracks turned in to mid-oceanic ridges.

Biography

Subhasis Sen, Date of Birth: 9 March, 1936, M Sc from Jadavpur University in 1960, Ph D from Nagpur university in 1974, from 1961 to 1996 worked in Central Fuel Research Institute under Council of Scientific & Industrial Research as a Scientist, retired in 1996 and since then working on various fundamental problems of earth and planetary sciences, published more than 160 papers and two books entitled ‘Earth - The Planet Extraordinary’ (Allied Publishers, New Delhi) and ‘Decoding the Solar System (Author House, London), developed a new concept of global tectonics termed ‘unified global tectonics’ for understanding earth and other planets of the Solar System, recipient of “Bharat Joyti Award” in 2013 instituted by India International Friendship Society, New Delhi.

Email: ssennagpur82@yahoo.com