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- Great Rift Valley (4717 bytes)
3: ...about 15 million years ago. It was named by the explorer [[John Walter Gregory]].
7: ... fault continues as the Great Rift Valley, which split the older [[Ethiopian highlands]] into two halv...
14: ... alkaline, while [[Lake Naivasha]] needs to be supplied by freshwater springs to support its biologica...
16: ... lithosphere may rupture and eastern Africa will split off to form a new landmass. If spreading conti...
20: ...nald Johanson]]. [[Richard Leakey|Richard]] and [[Maeve Leakey]] have also done significant work in this ...
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