The East African Rift Valley (EAR) is a developing divergent plate boundary in East Africa. … The EAR formed in the Miocene approximately 25 million years ago; originating at the Afar triple junction and extending southwards over time.
Is Africa a divergent boundary?
The western edge of the African Plate is a divergent boundary with the North American Plate to the north and the South American Plate to the south which forms the central and southern part of the Mid-Atlantic Ridge.
What plates formed the East African Rift Valley?
The East African Rift Valley, as the region is known, formed where the Somalian and Nubian plates are pulling away from the Arabian Plate. The eastern branch of the rift passes through Ethiopia and Kenya, and the western branch forms a giant arc from Uganda to Malawi.
Is the East African Rift a continental rifts?
Continental Rift Valleys
Very few active rift valleys are found on continental lithosphere. The East African Rift, the Baikal Rift Valley, the West Antarctic Rift, and the Rio Grande Rift are Earth’s major active continental rift valleys.
What caused the East African Rift?
The East African Rift is one of the great tectonic features of Africa, caused by fracturing of the Earth’s crust. … On one side of the rift lies the Nubian (or African) tectonic plate, which includes the older continental crust of Africa.
What is the East African Rift is an example of?
The East African Rift Valley is an example of a divergent boundary in an area of continental crust. It is one the geologic wonders of the world, a place where the earth’s tectonic forces are presently trying to create new plates by splitting apart old ones.
Is the East Pacific Rise a divergent boundary?
The East Pacific Rise is a “divergent” plate boundary, where huge slabs of the Earth’s crust (plates) are moving away from each other.
Is the Great Rift Valley a divergent boundary?
Today, the term is most often used to refer to the valley of the East African Rift, the divergent plate boundary which extends from the Afar Triple Junction southward across eastern Africa, and is in the process of splitting the African Plate into two new separate plates.
What is a divergent boundary?
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.
How do rift valleys form at divergent boundaries?
As tectonic plates move away from one another at mid-ocean ridges, molten rock from the mantle may well up and harden as it contacts the frigid sea, forming new oceanic crust at the bottom of the rift valley. … Over millions of years, the Mid-Atlantic Ridge has formed rift valleys as wide as 15 kilometers (9 miles).
What type of boundary is the East African Rift?
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.
What are the characteristics of a rift valley?
Rift Valley Landforms Have 2 Main Characteristics:
A portion of land that drops, forming a valley. Bordered by fault zones and separating land masses.
What kind of plate boundary is in New Zealand?
Modern tectonic setting and earthquakes
New Zealand is currently astride the convergent boundary between the Pacific and Australian Plates.
What type of plate boundary is located along the Lake Baikal Rift Zone in Russia?
The Baikal Rift zone is a large high-latitude Cenozoic continental rift in Asia that formed along the plate boundary between the Siberian craton and a collage of microplates to the southeast.
What is the type of plate boundary that occurs between the African plate and the Arabian Plate?
The type of tectonic plate boundary that occurs between the African Plate and the Arabian Plate is a divergent plate boundary. As the African Plate and the Arabian Plate move in opposite directions, they create a large rift between them.
Is the Horn of Africa breaking off?
Scientists say a new ocean will form in Africa as the continent continues to split into two. … It is an active continental rift that began millions of years ago, splitting at 7mm annually.