The East African rift system is marked by substantial volcanic activity, including lavas erupted from fissures along the rift in the region. Much of the faulting observed in this image cuts through such lavas. Elsewhere along the rift system, individual volcanoes form.
What are some distinctive features of the East African Rift Valley?
The most well-known rift valley on Earth is probably the so-called “Great Rift Valley System” which stretches from the Middle East in the north to Mozambique in the south. The area is geologically active, and features volcanoes, hot springs, geysers, and frequent earthquakes.
Why is the Great Rift Valley the most distinguishing feature of the African continent?
The system of rift valleys that characterizes the African continent represents a perfect environment to understand the evolution of mankind; for the important paleoanthropological discoveries in Ethiopia, Kenya, Tanzania, Uganda and Zaire, the African rift valleys are indeed considered the “cradle of mankind”, that is …
What are the characteristics of Rift Valley?
- A rift valley is a lowland region that forms where Earth’s tectonic plates move apart, or rift. …
- Tectonic plates are huge, rocky slabs of Earth’s lithosphere—its crust and upper mantle. …
- Many rift valleys are part of “triple junctions,” a type of divergent boundary where three tectonic plates meet at about 120° angles.
What does the creation of rift valleys indicate about the eastern part of Africa?
Twenty-five million years ago, as plate tectonics began to pull apart eastern Africa, the landscape that would eventually be home to the first humans began to take shape. … The East African Rift Valley, as the region is known, formed where the Somalian and Nubian plates are pulling away from the Arabian Plate.
What is the East African Rift an example of?
The East African Rift Valley (EAR) is a developing divergent plate boundary in East Africa. Here the eastern portion of Africa, the Somalian plate, is pulling away from the rest of the continent, that comprises the Nubian plate.
Which plates are a involved the East African Rift Valley?
A narrow zone, the rift is a developing divergent tectonic plate boundary where the African Plate is in the process of splitting into two tectonic plates, called the Somali Plate and the Nubian Plate, at a rate of 6–7 mm (0.24–0.28 in) per year.
What is the most important physical feature of East Africa?
The physical geography of East Africa is dominated by the Great Rift Valley, which extends through the middle of the region from north to south. Associated with the rift valleys are vast savannas such as the Serengeti Plain, large lakes, high mountains, and the highlands of Ethiopia.
Why is Africa called the birthplace of humanity?
Africa is known as the “Cradle of Humankind” because it is believed that all human life originated in Africa. Africa is sometimes known as the “Cradle of Humankind”. … Without their groundbreaking work, the story of human evolution may still be a mystery. A hominid is a type of species that includes the human family.
Why is the Great Rift Valley such an important geographical feature of East Africa?
The Great Rift Valley provides evidence of a split in the African Plate, dividing it into two smaller tectonic plates: the Somalian Plate and the Nubian Plate. The Great Rift Valley in East Africa is divided into the Western Rift and the Eastern Rift.
Why Rift Valley has steep sides?
c) Rift valleys have steep sides because they are formed when the earth crust is divided, they are not like those valley which are formed by soil erosion.
What will eventually happen if a Rift Valley continues to pull apart?
If these two rift zones continue they will break apart the crustal plates they are located on and will create new plates. Sea water will flood the rift valleys and they will eventually become seas like the Red Sea.
Is a rift valley convergent or divergent?
Areas where plates are colliding form convergent boundaries, and areas where plates are expanding create divergent boundaries. Rift valleys are formed by divergent boundaries that involve continental plates.
Which type of fault is found in the Great Rift Valley of East Africa?
Which type of fault is found in the Great Rift Valley of East Africa? In a normal dip-slip fault, which of the following statements describes the movement of the hanging wall relative to the footwall? The hanging wall moves down relative to the footwall.
What African countries does the Great Rift Valley pass through?
The Rift Valley consists of a group of independent interior basins, extending from Djibouti in the north to Tanzania in the south, nearly half being located in Ethiopia.
|Name of basin||Total area of basin||Area in the country|
|Southern lakes:||178 800|
How fast is Africa splitting apart?
The three plates are separating at different speeds. The Arabian plate is moving away from Africa at a rate of about 1 inch per year, while the two African plates are separating even slower, between half an inch to 0.2 inches per year, according to Macdonald.