National Geographic : 1970 May
Its opaque green waters stretch nearly 155 miles from north to south, and 35 miles at its widest. The lake teems with fish and croco diles, and herds of animals live here, concen trated along the almost uninhabited eastern and northern shorelines, where goats and camels have not stripped the soil of vegetation. About 10,000 years ago, the level of Rudolf stood some 200 feet higher than today. Once it connected with the Nile, and even now its waters contain Nile perch, sometimes weigh ing 200 pounds and more (page 721). But then it shrank drastically, like other Rift Valley lakes, perhaps as climatic change altered the rainfall pattern. In prehistoric times, great quantities of ash, and sometimes lava, erupted from volca noes surrounding Lake Rudolf. The ash, to gether with soil and sand washed into the lake, built up thick sedimentary deposits. Strangers amaze a young Gabbra the chronicles of time. Supported by the Na- woman north of Marsabit. En route tional Geographic Society, Leakey's group to Lake Rudolf, the expedition hired braved the threat of armed bandits to explore camels from her tribe. these remote, wind-swept plains. 717 KnnrAMRnMF BY BOB CAMPBELL BELOW1 AND GORDON W. GAHAN N.G.S.