What role did the Great Rift Valley play in human evolution 20

The East African greatest rift valley is the largest fault zone on the world continent and looks like a huge Great Rift Valley satellite scar from the satellite**. When you cross the Indian Ocean by plane and enter the equator of the East African continent, you can look down from the window and see a huge "knife mark" on the ground, which immediately makes people feel a sense of wonder and magic, which is the famous "Great Rift Valley", also known as the "Grand Canyon of East Africa" or "Big Gully of East Africa". This large rift valley with a length equivalent to the circumference of the earth is 1 6 years long, and it is the largest rift valley in the world.

According to the analysis of geophysical exploration data, it is concluded that there are many active volcanoes in the East African Rift Belt, and the uplift phenomenon is still expanding to the wings, although the rate is very slow, in the past 2 million years, the average annual expansion rate is only 2 to 4 centimeters, but if the tuxedo continues, one day in the future, the Great Rift Valley will finally separate its eastern land from the African continent, resulting in a new ocean and numerous islands.

The Great Rift Valley is also one of the most birthplaces of human civilization, in the late 50s of the 20th century, in the west side of the East Branch of the Great Rift Valley, in the Audwe Valley in northern Tanzania, found a fossil skull of a prehistoric man, according to the determination and analysis, the age of survival is 2 million years ago, this skull fossil was named the East African warrior as "East African". In 1972, on the shore of Lake Turkana in the northern part of the rift valley, a 2.9-million-year-old skull was excavated. In 1975, a rift zone on the border between Tanzania and Kenya was discovered to be 3.5 million years old"Capable people"bones, and a 22-meter-long "Homo Seng" footprint was found in the hardened volcanic ash layer.

This shows that as early as 3.5 million years ago, there were people in the Great Rift Valley who were able to walk upright and belonged to the earliest members of mankind.

This series of archaeological discoveries in the Great Rift Valley region proves that it was once said by Western colonialists"Savage, poor, backward Africa"In fact, it is one of the cradles of human civilization, a land with a glorious ancient civilization.

It is because of the Great Rift Valley that the terrain has changed. The original tropical rainforest became grasslands, and the forest apes had to walk on the meadows, thus playing an important role in the evolution of humans.

The Great Rift Valley was formed by the fracture of the earth's crust more than 10 million years ago. According to the theory of plate tectonics, this is the detached landmass, i.e., eastern Africa is located in a zone where the upward flow of mantle material is strong. Under the upwelling, the East African crust is uplifted to form a plateau, and the dispersion of the upward rubber finger flow in the opposite direction on both sides causes the fragile part of the earth's crust to open and fracture and become a rift zone.

The Great Rift Valley is the largest fault zone on the continent and looks like a huge scar from a satellite**. This rift belt is located in eastern Africa, from the mouth of the Zambezi River in the south to the north through Lake Malawi and divided into two branches: the east branch of the rift belt along the east side of Lake Victoria, north through Tanzania, central Kenya, through the Ethiopian plateau into the Red Sea, and then from the Red Sea to the northwest to the Jordan Valley, with a total length of nearly 6,000 kilometers.

The reason for the formation of the Great Rift Valley is that the East African Rift Valley is located at the junction of the African plate and the Indian Ocean plate, and about 30 million years ago, it was formed by the continental drift movement that separated it from the Arabian paleocontinent due to the splitting and stretching of the two plates. At that time, the earth's crust in this area was in a period of great movement, and the whole area was uplifted, and the mantle material below the earth's crust rose and diverted, generating a huge tension, and it was under the action of this tension that the earth's crust underwent a major fracture, thus forming a rift.

The Great Rift Valley is the largest fault zone on the world's continent and looks like a giant scar when viewed from a satellite**. When flying over the equator of Haohan, which is printed into the East African continent, looking down from the window, there is a huge strip on the ground"Knife marks"Presented in front of the eye Yuntong, it immediately makes people have a sense of surprise and magic, which is the famous "Great Rift Valley", also known as the "Grand Canyon of East Africa" or "Great Rift Valley".

The eastern branch of the rift valley stretches from the mouth of the Shire River in the south, passes through Lake Malawi, runs through the central part of the East African Plateau and the central Ethiopian Plateau to the northern end of the Red Sea, with a total length of about 5,800 kilometers. The west branch stretches from the northwest end of Lake Malawi in the south, through Lake Tanganyika, Lake Kivu, Lake Mobutu, etc., to the White Nile Valley in Sudan, with a total length of more than 1,700 kilometers, which is the longest discontinuous valley in the world, named by the explorer John Walter Gugri.

The location of the Great Friction Valley is described in three triangular points: the south point is at the mouth of the Mozambique estuary, the northwest point is as far as the Jordan River in Sudan, and the north point has access to the Dead Sea. There are quite a few lakes and volcanic groups in between. The Great Rift Valley is a natural reservoir that concentrates most of Africa's lakes, with more than 30 in total.

The reasons for the formation of the Great Rift Valley are as follows:

The Great Gap of East Africa is a 6,000-kilometer-long Great Rift Valley located in eastern Africa, stretching from southern Ethiopia to western South Africa, and is the largest rift valley in the world. It is formed due to tectonic activity in the earth's crust, as well as the effects of ocean currents and climate change.

The formation of the Great Rift Valley is mainly due to tectonic activity in the earth's crust. Tectonic activity refers to the stretching, squeezing, and folding of the earth's crust, which causes the fracture of the earth's crust and the formation of a large rift valley. The formation of the Great Rift Valley is mainly due to the tectonic activities of the earth's crust, that is, the stretching and folding of the earth's crust, which causes the earth's crust to break down, forming the Great Rift Valley.

In addition, ocean currents and climate change are also important reasons for the formation of the Great Rift Valley. Current resistance refers to the currents in the ocean, which affect the temperature and depth of the ocean, and thus the structure of the seabed. Climate change also affects the temperature and depth of the oceans, which in turn affects the structure of the seabed.

All of these factors can lead to fractures in the earth's crust, resulting in the formation of the Great Rift Valley.

The Great Rift Valley is a very important geological formation, and its formation is an important research topic for geologists. The formation of the Great Rift Valley can help us understand not only the tectonic activity of the Earth's crust at an early stage, but also the effects of ocean currents and climate change.

The earth is expanding and moving, but it is not that the earth has become larger, but that it is cyclically expanding, constantly flowing, and the matter and volume have not increased or decreased.

Plate splitting, crustal fracture and collapse formed.