It was originally a dried
It was originally a dried up lake with volcanic deposits on its banks. About 500,000 years ago an earthquake diverted a stream into the region which began to cut through layers of sediment, eventually creating a 295 foot deep, 30 mile long ravine. It is also the where the first monolith in 2001: A Space Odyssey teaches hominids to use stone tools. FTP, identify this region in the eastern Sergenti Plains of Tanzania, divided into a number of beds, most famous for the containing the remains of an Australopithecus boisei.
It was originally a dried up lake with volcanic deposits on its banks.
Olduvai Gorge (Prompt on Great Rift Valley)