Great Rift Valley
About twenty million years ago, the length of Africa was cleaved by great subterranean forces, the result being The Great Rift Valley. This fault line, some 5,600km (3,500 miles) long, cuts a swathe north to south from Ethiopia's Red Sea through Kenya, Tanzania, Malawi and Mozambique. In some places it left a string of very large deep lakes such as Lake Victoria, Lake Tanganyika and Lake Malawi. In others there is a necklace of small shallow ones such as Kenya's Lake Nakuru and Lake Bogoria.
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