Ngorongoro is found in the "Land of the Giant Craters." This caldera is 14 miles (22.5 km) across at its widest point. It is 2000 ft (610 m) deep. It grew to be this large by sinking of the caldera floor. The caldera floor is very level and holds a lake. Streams run down the caldera walls into the lake. Ngorongoro is full of pastureland of red and white clover. Over 75,000 wild animals live in this caldera.
Ngorongoro is now extinct. It once erupted trachytic flows and large quantities of pyroclastic materials. Tephra from this volcano helps scientists put ages on early human fossils found there.
Sources of Information:
Coleman, Satis N., "Volcanoes New and Old," The John Day Co., New York, 222 pp., 1946.
King, Lester C., "South African Scenery," Hafner Publishing Co., New York, 308 pp., 1963.
Short, Nicholas M. and Blair, Robert W., "Geomorphology from Space, A Global Overview of Regional Landforms," NASA Scientific and Technical Information Branch, 717 pp., 1986.
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