Oceans water is of extraterrestrial origin
|Updated June 01, 2013
The surface of the Earth is covered by water, revealing the continents and archipelagos. This water is part of the "Ocean" with a big O. Oceans cover about 361 million km2, or 70.8% of the surface of the planet and their average depth of 3 700 to 3 800 meters.
The Earth has been at this time, enough water for the oceans were formed around the continents. Entering the mantle from the surface, water would have softened the earth and reduces the voltage at which the materials are broken. An event at the origin of the tectonic plates and the emergence of continents.
Image: The major tectonic plates, bounded by the lines of earthquakes. The plate of North America from South America, Eurasia, Africa, Pacific, Australia and Antarctica, are visible in this image.
Water is not from the fumes emitted during the intense volcanism beginning of the creation of our planet. To Francis Albarède, water is not part of the initial inventory of the Earth but from the stirring maintained in the outer solar system by giant planets.
The distribution of matter has the effect of cleaning the solar system's dust concentrating material in the planets in formation.
Image: distribution of matter has the effect of cleaning the solar system's dust concentrating material in the planets in formation.