Before tens of thousands of years, was the Amazon River flows from east to west, and not from west to east, as is the case today, this fact Mthbth, but the question is, why change the direction of the Amazon River
The answers are many and various, and most recently a new scenario presented by geophysicist Brazilian, but before that we address this issue let us know first on the Amazon River and its inception by geologists
Millions of years ago, the rivers that flow westward through what is now northern Brazil, unlike track and headed east to the Atlantic Ocean and thus was born the Amazon River, the second longest river in the world after the Nile River, the main river in South America, with a length of about 6,437 km It contains an abundant amount of water comparable to the amount of water in the Mississippi, the Nile and the Yangtze combined
Featuring some of the sites the petition to the extent that it is unable to human standing on one of its banks to see the other side, where the width of the river from 2.5 to 10 kilometers up to 150 km at the mouth almost, and the average depth of the Amazon amounts to about 10 meters and up to more than 90 meters in some places
Begins the course of the Amazon River from the heights of the Andes in the Republic of Peru, a small stream called the Apurimac River, which empties into the north-west of the Ucayali River, a branch of the lower Amazon River in Peru. Being Ucayali River north through the Andes and then turns east and joins the Maranon River, a branch of the top of the Amazon River. Contact this happens in a place close to Iquitos in Peru Vickl the main channel of the Amazon river to continue on its path eastward across Brazil and empties into the Atlantic Ocean on the northern tip of the island of Maraju
Now that we know the Amazon River to the promise to our topic
What happened to this change in direction
Many geologists believed that this event was the result of a gradual rise in the Andes east of the South American continent, this increase, which began 65 million years ago due to convection currents in the ground
Considers geothermal the most important reasons that lead to the formation of convection currents in the ground, so the occurrence of changes in heat flux interior of the Earth causes the occurrence of convection currents within the Earth and the resulting rise of material fused into the ground and retrieve some sediment cold and moved down to the ground at the same time, this means that the appearance of the Andes had the effect of reversing the flow of the rivers
Why do you say the new theory
The new study refutes this view, arguing that since about 10 million years old, it was not the Amazon River exists in its current form, and offers a completely different scenario includes three steps
The first step in this new scenario proposed by the Brazilian Geophysical Victor Sacek from the University of Sao Paulo in Brazil begins the formation of lakes at the foot of the Andes Mountains because of fissures in the rock layers, and thus shaped depressions filled with water
Followed by a second phase of the scenario and which accumulate sediments derived from the erosion of the Andes in these depressions, but these deposits is very slow compared to the drilling mechanism
Then in the final phase of drilling will continue, while continuing accumulation of sediment in the depressions, and then go up more and more land
The result is that 10 million years ago, this land has become high enough to happen decline in the flow of rivers
The adopted Sacek on a computer model that includes the interaction between the growth of the Andes and the pressure on the earth's crust in the region and climate, where the model simulates the evolution of the terrain in South America during the 40 million years, ie the period that began after the birth of the central Andes and before the rise eastern part of those the mountains, and the simulation results included a lot of evidence of pre-existing in the geologic record, has been collected in Sacek reports on the Internet before they are printed
The new theory met with applause by many researchers due to its support to the evidence in the geological record, and everyone agrees also that the new scenario developed by the researcher Brazilian can be true to a large degree due to erosion and sedimentation factors are strong to be reckoned with them in the movements of geological and do not rule out that they have caused change in the direction of the Amazon, and Amazon is not alone, but many of the rivers in the world
It remains to be scientific research in many geological phenomena despite the offer has not arrived yet never reaches results or scenarios we can say about it is one hundred percent correct, was surprised after months or years another theory to explain why change the direction of the flow of the Amazon be far away or contrarian the theory that we listed above today
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