Great Rift Valley

The Great Rift Valley is a long and important natural feature. It stretches for about 6,500 kilometres or 4,000 miles. It runs from the plains of northern Syria through the Red Sea and all the way down to Mozambique in the south. This area has many valleys and low areas.

Scientists in geography, animal studies, and old life studies still use the name Great Rift Valley. In Earth science, many experts now call it the Afro-Arabian Rift System. This name explains the natural processes that made the valleys and mountains.

The name Great Rift Valley was first used by a British geologist named John Walter Gregory in 1896. He built on ideas from another scientist, Austrian geologist Eduard Suess. He suggested these features might stretch from Syria to Mozambique.

Geology

The Afro-Arabian Rift created the Great Rift Valley. It starts at the Dead Sea Transform, the boundary between the Arabian and African plates. This area stretches from southeastern Turkey to the Gulf of Aqaba.

The Red Sea Rift is a mid-ocean ridge where the Nubian and Arabian plates are moving apart. It connects to the East African Rift system at the Afar triple junction. The East African Rift goes south through Ethiopia and then splits into two parts that meet again north of Lake Malawi. These rifts are linked with volcanoes and the formation of deep basins.

Geography

The Great Rift Valley is a long, winding series of valleys and depressions. It stretches about 6,500 kilometres from northern Syria to Mozambique. It passes through many countries and has many different landscapes, including rivers, lakes, and mountains.

The northern part of the Great Rift Valley begins in Syria and runs down through the Red Sea. It includes areas like the Ghab Plain in Syria and the Jordan Rift Valley, which contains the Sea of Galilee and the Dead Sea. Further south, the valley continues through Ethiopia and Kenya, where it is often called the Kenya Rift Valley. This area has many lakes and volcanoes, including Lake Bogoria and Mount Kilimanjaro, one of Africa's highest peaks.

In East Africa, the Great Rift Valley splits into two branches. The eastern branch runs through Kenya and into Tanzania, while the western branch includes lakes such as Lake Albert and Lake Tanganyika. The valley ends in southern Africa, near Lake Malawi in Mozambique, where it continues as the Urema Valley.

Asian section

The northernmost part of the Great Rift Valley begins at the Ghab Plain, formed above the Ghab basin, along the Orontes River in northern Syria. Moving south, the Beqaa valley lies next, containing two rivers: the Orontes, which flows north, and the Litani, which flows southwest. The Hula valley is a flat valley at about 70 metres above sea level. The Jordan river flows through this area into the Sea of Galilee. The Dead Sea is the deepest part of this area.

Red Sea

The Asian and African sections of the Great Rift Valley are connected by the Red Sea. Directly south of the Red Sea, the first part of the Great Rift Valley is the Danakil Depression within the Afar Depression. The deepest part of this depression lies below sea level. Further south, volcanic activity becomes more visible around the Erta Ale Range. The next clear section is the Main Ethiopian Rift (MER) valley. The northern MER extends from the Afar Depression to Lake Koka. The central section continues to Lake Awasa, and the southern section reaches the "broadly rifted zone."

In the "broadly rifted zone," the Great Rift Valley becomes less clear. Further south, it divides into two branches: the western (Albertine) rift and the eastern (Gregory) rift. The eastern branch starts with the valley of the Omo river in southern Ethiopia and Lake Turkana in Kenya, often called the Kenya Rift Valley. This area includes several lakes and many volcanoes. The eastern branch continues into Tanzania. The western branch of the Great Rift Valley begins with the Rhino Camp basin and continues along Lake Albert. This branch features a series of deep lakes: Lake Albert, Lake Rutanzige, Lake Kivu, Lake Tanganyika, and Lake Rukwa. Lake Tanganyika is the world's second-largest and second-deepest freshwater lake. The southernmost part of the Great Rift Valley includes Lake Malawi, the world's third-deepest freshwater lake. The rift continues south as the valley of the Shire River, flowing from Lake Malawi into the Zambezi River.

Ornithology

The Great Rift Valley and the Red Sea are important paths for birds that travel long distances. Many birds, like the European honey buzzard, Steppe eagle, Common buzzard, Lesser spotted eagle, White Stork, and Great White Pelican, use this route to move between different places. This path is very important for these birds.

Other uses

The term "Great Rift Valley" is used in many areas of study like epidemiology, paleontology, archaeology, ecology, and zoology. Scientists might use it when talking about Rift Valley fever or when studying animals and plants in that area. Each field looks at the part of the Great Rift Valley that is most important for their work.