Some thirty lakes make up the African lakes of the rift valley and
they include some of the oldest and largest lakes in the world,
providing work, food and sustenance for millions who live near
them.
It is believed that the human race first lived in this area with
humanoid fossils of our ancestors being found there that are around 10
million years old. The area is also home to the fossilised
remains of 'Lucy' who lived approximately 3.2 million years ago
and is currently believed to have been the first humanoid to
have walked upright.
The Rift Valley itself, a crack or fissure in the earth's crust
created by violent subterranean forces that
tore apart the earth's crust, can be seen from space and it runs for
approximately 4000 miles from Syria to Mozambique. The valley was formed by
movements in the Arabian plate, the Nubian plate and the Somalian plate which
are still drifting apart creating low areas where water has accumulated to
form the lakes. The Rift Valley is at its most
magnificent in East Africa where the process of 'rifting' has led to the
creation of the many spectacular lakes that are located in the region. The
process itself however is ongoing with many active volcanoes in the area
along with numerous hot and boiling springs indicating underground activity.
It is believed that the ongoing underground volcanic activity
around the rift will eventually cause the continent of Africa to
split with low lying areas, currently under sea level, being
filled from the Red Sea, creating a new ocean with the remains
of Somalia, Tanzania and Mozambique forming a new off Africa
continent. The lakes are
broadly grouped into the Ethiopian Rift Valley Lakes which are
mostly alkaline, the Eastern Rift Valley Lakes of which three
are freshwater and five alkaline, the Western or Albertine Rift
Valley Lakes which are freshwater and the Southern Rift Valley
lakes which are all fresh water save for Lake Rukwa.
Below is a video explaining how the Rift Valley itself was
formed whilst below on this page we explore a number of the
Great African lakes in a series of video documentaries.
Some of these show how at least two of the lakes are drying up,
one because of the construction of a hydro-electric dam on its
main tributary river and the implications of that process for
those whose lives depend on the lakes.
African Lakes: Lake Tanganyika
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African Lakes: Lake Kivu |
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African Lakes and Rivers: The Nile River
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African Lakes and Rivers: The Niger River
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