The seismic anomaly at the bottom of the Atlantic ocean may point to the underlying processes, which ultimately will lead to the emergence of a completely new part of the land, said scientists.
A large-scale study conducted marine geologist Joao Duarte from Lisbon University in Portugal.
He spent several years studying the seismic activity of the native city. The most famous and devastating in its history was the Lisbon earthquake in 1755 followed by a tsunami. According to historians, then killed about one hundred thousand people.
“What is our life? Game!”“World mind games”: the premiere of “the World” Another earthquake followed in 1969, but it was much less powerful, and human victims are not resulted.
The scientist decided to find out why the tremors in principle could occur because, according to the calculations, the epicenter was located on a flat area of seabed near the Iberian Peninsula, far from the active tectonic faults.
Studies have shown that deep in the bowels of this district there are some anomalous seismic processes, reports
They occur at depths of up to 250 kilometers, under a stable layer of rocks known as the front of serpentinization (process by which rock formations absorb water).
Experts have suggested that in the course of geological processes, lithospheric plate is gradually stratified: the upper solid layer provides a horizontal zone of breaks, and lower, softer structures begin to depart from him.
If the theory is correct, the Peninsula is a brand new subduction zone. She can cause earthquakes, and when the process reaches its climax, it will begin the formation of a new supercontinent.
To verify the findings of Duarte in practice is unlikely, as the tectonic processes take millions of years.
But his scientific work, however, is of great interest to science.
“Nucleation of subduction zones is one of the main unresolved problems in earth Sciences, and the coast of Lisbon can be an ideal natural laboratory to study this problem,” said the Portuguese scientist.
Earlier it was reported that a new supercontinent may appear on Earth in 200 million years, but scientists still can’t pinpoint how he might look.