Off the coast of Portugal, a new subduction zone

June 18, 2013. Geologists at Monash University in Melbourne, a study was conducted that showed that the Atlantic coast of Portugal passes the formation of a new active subduction zone. Earlier passive margin south-western outskirts of Iberian lithospheric plate and the bottom of the ocean begin to interact.

As is usually the case with subduction, one lithospheric plate sinks beneath the second and goes deeper into the Earth's mantle. These tectonic changes near to Portugal suggest that over time, the area will decrease the Atlantic Ocean, and Europe will be much closer to North America. So far, geologists say, the process is in its "embryonic" state, but for all earthlings is important that it have found so early.

The first bells enhance the Iberian plateau appeared in the 18th century, when the Lisbon earthquake of 1755 survived, badly destroyed the current Portuguese capital. What is happening under the water column now points to the beginning of a new phase of the Wilson cycle, we conclude that the first of the subduction zone and shared the supercontinent Pangaea formed the oceans, but now the process will go in the opposite direction, that is, the convergence of fragments of land and the closure of the oceans. There is a chance that, 220 million years of the Iberian Peninsula with the United States to meet and form a new continent.

Based on:  Geological Society of America

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