What spreads the seabed?
seabed spread is a constant geological phenomenon and the primary driving force of the continental drift. The process begins when the bark is heated from a lower hovering cloak, sometimes called a cloud cloud. This creates a three-point-armed cracks called a triple intersection, usually with each torn at an angle of 120 ° to the rest. The bark along the length of the crack is heated by the underlying sheath and becomes more plastic and less denser. The bark rises, creates a wide dome and extends. Over millions of years, this process has been controlled by a continental drift and connects continents and then divided them in a process called a supercontinental cycle. This process performs its course every 250 to 500 million years. Last time there was a supercontinent, a pangea, about 200 million years ago. During the next 200 million years, the world continents are assumed that the new supercontinent called Pangea Ultima again.
in a typical distractionThe system will continue to spread from the cracks, while one, a "unsuccessful crack", will cease to spread. If the ground, unsuccessful tearing becomes a rift valley. Rifts, which are constantly spreading, are guaranteed to create an ocean, even when they start on the ground. The Atlantic Ocean was created when it was opened between the continents of North America, Africa and Europe. This crack still exists to this day, in the form of a central -Atlantic crack, one of the main submarine mountains on Earth.
As the seabed continues to spread, the magma throws itself to fill the gap and create volcanoes and mountains. Rifty is a place of geological activities, including earthquakes. Many world hydrothermal holes are found on or near the cracks that cause seabed spreading.
When a new tearing begins to spread on the ground, the water plunges in and forms the sea. This can be seen in the Red Sea, which separates Eurasia - Saudi Arabia - from Africa - Egypt, Sudan and Ethiopia. During the millions of years, this oneTorn will continue to spread and create a new ocean.
The sulfur of the seabed is pushing the edges of ocean tectonic plates under continental plates that are lighter. This bark is dampened into the shell, where it melts and becomes magma. In this way, the ocean bark is constantly complemented. Unlike the continental bark, the oldest bark in the seabed is only about 200 million years old, which can be billions of years old.