In ancient times, the continents were not arranged as they are today. At the very beginning, there was only one supercontinent, a vast expanse of land. This continent was called Pangaea . It existed during the late Paleozoic and early Mesozoic eras , approximately 335 million years ago. Then, about 200 million years ago, this immense landmass began to break apart due to tectonic plate movement, dividing the continents into the ones we know today.
In this article we are going to tell you everything you need to know about Pangea, its evolution and its importance.
Key features
Much of this supercontinent was concentrated in the Southern Hemisphere. The only ocean surrounding it was called Panthalassa. Life on Pangaea was different from today. The climate was warmer, and the life of the animals and plants was completely different. Some of the animals that lived during the 160 million years that this supercontinent existed were traversodonts and Shringasaurus indicus. These animals are characterized by having two frontal horns and a body length of approximately 4 meters. The first beetles and cicadas appeared on this supercontinent. It was at the end of the Triassic period that many reptiles flourished. The first dinosaurs to form walked on Pangaea.
Not much is known about marine life since very few fossils have been found in the Panthalassa Ocean. It is thought that ammonoids, brachiopods, sponges, and corals were the animals that existed at that time . These animals adapted over the years. As for the flora, gymnosperms were dominant. These plants replaced all the spore-producing plants.
Alfred Wegener and Pangea
This man was a German scientist, researcher, geophysicist, and meteorologist who is best known for developing the theory of continental drift . He was the one who began to organize the ideas that the continents had been moving very slowly over the years. This movement has never stopped, and today we know that it is caused by convection currents in the Earth's mantle.
This idea of ​​continental drift was proposed in 1912 but wasn't accepted until 1950, 20 years after his death. This was because various paleomagnetism studies had to be conducted to analyze the Earth's magnetic field in the past. Furthermore, these studies also aimed to determine the location of tectonic plates in the past.
It all began when Alfred Wegener was looking at an atlas and wondered if the outlines of the continents fit together. He realized that the continents had once been joined together. After further study, he was able to explain the existence of a supercontinent, which he named Pangaea. The separation of this supercontinent was a very slow process that took millions of years and began to separate the remaining land areas that formed the six continents of today.
Tectonic plate separation
Throughout history there are many scientists who have tried to reiterate how the movement of the continents could have been from the position of Pangea until today. It is known from various studies that tectonic plates move constantly as they are located above a viscous surface or mantle. This viscous mantle corresponds to the materials of the terrestrial mantle. These convection currents of the mantle cause the displacement of the continents due to a movement of the masses due to differences in densities. It has also been discovered where there are cases where the plates break and separate more quickly.
Some research has indicated that the separation of tectonic plates occurs in two phases. The first phase is characterized by the movement of the continents. The second is when, after millions of years of stretching, the plates become too thin, break, and separate, allowing ocean water to penetrate between them.
Life before Pangaea was entirely different. Dry land and life did not originate with this supercontinent. Before it, several continents existed, such as Rodinia, Columbia, and Pannotia . Rodinia is estimated to have existed 1,100 billion years ago; Columbia between 1,800 and 1,500 billion years ago; and the age of Pannotia is not as precise. This continental drift indicates that in millions of years, the Earth's distribution will be different from what it is today. This is because the Earth is in constant motion. It is a fact that the distribution of the continents will be completely different in millions of years.
When Pangaea gave way to Gondwana and Laurasia, the first coastlines and the Atlantic and Indian Oceans emerged. The ocean that divided these two land areas was called the Tethys.
Pangea, past and future
Although life in the future will be different, technology allows us to recreate what our planet will look like in 250 million years. It is this time when it is thought that there will be a radical change and it has been baptized by the name of Pangea Ultima or Neopangea.
All this is a mere assumption, explanations persist developed by scientists who have studied the movement of tectonic plates for many years. If the earth does not suffer any impact from asteroids, another phenomenon that can completely change the entire landscape of the earth, it is thought that very little of the Atlantic Ocean will be left because the continental masses will rejoin into a supercontinent.
It is also estimated that Africa will collide with Europe and Australia will drift northward, eventually joining with the Asian continent . In other words, our planet will be somewhat similar to how it was approximately 335 million years ago.
I hope that with this information you can learn more about Pangea and its characteristics.