When two continental plates diverge, a valleylike rift develops. This rift is a dropped zone where the plates are pulling apart. As the crust widens and thins, valleys form in and around the area, as do volcanoes, which may become increasingly active.
What is the process in which dry conditions spread into areas that are moist?
|Desertification||An expansion of dry conditions into moist areas that are next to deserts-process by which land becomes a desert|
|Nile River||world’s longest river, flowing over 4,000 miles through the Sudan Basin into Uganda, Sudan, and Egypt|
What does the pulling apart of continental plates create in Africa?
Seafloor spreading caused the Arabian and African plates to rift apart. The Indian Ocean flooded the rift valley between the continents, creating the Red Sea. The two major rift valley systems of the East African Rift are the Gregory Rift and the Western Rift.
What makes the Edge of Africa’s plateau in southern Africa?
Great Escarpment, plateau edge of southern Africa that separates the region’s highland interior plateau from the fairly narrow coastal strip.
What are long thin valleys that formed in Africa as continental plates pulled apart?
|Long, thin valley that formed in Africa as continental plates pulled apart are called..||Rift valleys|
|Africa’s highest peak is called||Mount Kilimanjaro|
|A steep slope with a nearly flat plateau on top is||an escarpment|
|After oil, the most profitable commodity in Africa is||Coffee|
Is Africa breaking apart?
The African continent is slowly separating into several large and small tectonic blocks along the diverging East African Rift System, continuing to Madagascar — the long island just off the coast of Southeast Africa — that itself will also break apart into smaller islands.
How Africa is divided?
Africa is the world’s second largest continent in area. … The UN Statistics Division has subdivided the African continent into five regions, Northern Africa, Central or Middle Africa , Southern Africa, East Africa, and Western Africa.
How might desertification affect people’s lives in the Sahel?
How might desertification affect peoples lives in the Sahel? Sahel is becoming a desert, as a result people are losing farmland to grow crops, and land for grazing livestock. What are some problems created by the Nigerian oil industry? Oil spills not always cleaned up, acid rain, soot, causes respiratory diseases.
Why did Nigeria end up poorer after the oil boom?
Mismanagement, poor planning, corruption, and a decline of oil left Nigeria poorer than before the oil boom. … This wealth has not resulted in economic prosperity for most African citizens because the government is so corrupt and there is not economic or industrial structure.
What is the economic base of most African nations?
Africa’s Economy Today
Most African nations have little manufacturing of their own. Their economies are based on providing raw materials—oil, minerals, or agricultural products—to the world’s industrialized countries.
Why does Africa have escarpments and rifts?
About 180 million years ago, a mantle plume under southern Gondwana caused bulging of the continental crust in the area that would later become southern Africa. … The stepped, steep walls of these rift valleys formed escarpments that surrounded the newly formed Southern African subcontinent.
Is South Africa a dry country?
South Africa is a relatively dry country, with an average annual rainfall of about 464 mm. … South Africa’s coastal regions are therefore relatively warm in winter.
Why is Africa called the plateau continent?
Africa is called the plateau continent because almost the entire continent is raised above sea level and drops sharply off at the coast.
What is 6000 feet below the Sahara?
serengeti plain. place where wildebeest graze in tall grass. aquifer. 6000 feet below the Sahara, you would find an. drilling for water.
Which location is on a major rift valley?
The Rio Grande Rift stretches from central Colorado to the Mexican state of Chihuahua. 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.
What are divergent boundaries?
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge is an example of divergent plate boundaries.