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  1. Great Rift Valley

    • IPA[ɡrāt rift ˈvalē]
    • ph.
      a large system of rift valleys in eastern Africa and the Middle East, the largest in the world, that runs for about 3,000 miles (4,285 km) from the Jordan valley in Syria into Mozambique. It is marked by a chain of lakes and a series of volcanoes, including Mount Kilimanjaro.