the Theory of plate tectonics a classic developed in the 1960s. This theory proposes that the outer layer of our planet consists of a plate rigidly separated by narrow limits. the Surface of the Earth can be seen as a simple puzzle, with only nine large plates and several smaller ones.
fifty years after the revolution of plate tectonics, the researchers are pretty sure that part of the continental plates is not uniform, is also not rigid. the Separation of a large then slowly move the continent-this continent, across the lining of the coat beneath it, emphasizing the continent, and distort the Earth’s crust. This is the process that has been occurring for millions of years ago.
In a new study conducted recently, scientists took a team of researchers international to build a computer model of the latest. the Model shows how large changes in the shape of the continents since the Triassic Period, about 250 million years ago. for example, at that time, the Pangaea supercontinent begins to break apart, then tear layer between Africa and North America. the Animation above shows the movement of the tectonic plates and the evolution of deformation associated with the rupture of Pangea.
The scientists also detailing a new understanding of the 3 causes of the separation of the continents of the stretcher in a paper published in May 2019 in the journal Tectonics.
a research Team consisting of Dietmar Muller, Professor of Geophysics at the University of Sydney; Maria Seton, ARC Future Fellow at the University of Sydney; and Sabin Zahirovic, Associate Researcher Postdoctoral at the University of Sydney.
in the meantime, this video shows a model of tectonic plates that move over Earth’s mantle. the Color blue represents plate a ‘recycled’ to the heat inside the Earth. While the color red represents hot material rising from the core of the earth (Credit: Maelis Arnould).
1. Incredible power
According to the paper, the style of tectonic colossal occurs along plate boundaries. It is seen when there are two continents (or more) collide, such as when Africa collided with Eurasia, forming the Alps.
“our new Research using data of geological and geophysical to show you exactly all the main zone of deformation (change in shape or form from good to less good) continent, which is built into the model of plate motion global, using the software GPlates,” the researchers wrote.
“We showed that at least one-third of all continental crust have changed shape massively since Pangea first began to separate. Breadth even reaches 75 million km squared (29 million square miles), roughly the size of North and South America and Africa combined.”
the Area of the continent that is deformed includes a great continent that stretched out and submerged, such as Zealandia, as well as the contraction of the crust in which the collision has occurred, generates a mountain belt like the Himalayas, the Mountains of the European Alps, the Zagros Mountains (Iran) and the southern Alps of New Zealand.
2. The rift in the Earth’s Crust
When the crust of the Earth thinned and stretchable, changes the crust is usually not seen from the human point of view, because this is quickly covered by sediment contained in the Earth. However, there are some exceptions.
the Valley of the East African Rift is one of the most spectacular of the changes in the crust visible on the surface of the Earth. Crack this giant does not sink below the surface of the ocean because of that region –in ancient times– driven by the Earth’s mantle –the layer of liquid heat that causes removal of soil and volcanism.
East African Rift sustained by the fault system of the giant that splitting Africa into two. Rift is changing the landscape of the flat merges with the high mountains and the basin of the lake.
Creates diverse vegetation, ranging from desert to forest. The diversity of environments on the Earth’s surface this section, opening the way for the early evolution and diversification of humans.