Mbuni African Safaris
Mbuni African Safaris
Mbuni African Safaris
Mbuni African Safaris
Mbuni African Safaris

Zanzibar

Zanzibar, Swahili Unguja, island in the Indian Ocean, lying 22 miles (35 km) off the coast of east-central Africa. In 1964 Zanzibar, together with Pemba Island and some other smaller islands, joined with Tanganyika on the mainland to form the United Republic of Tanzania. Area 600 square miles (1,554 square km). Pop. (2007 est.) 713,000. Geography Both Zanzibar and Pemba are believed to have once formed part of the African continent, the separation of Pemba having occurred during the Miocene Epoch (about 23 to 5.3 million years ago) while Zanzibar dates from the Pliocene Epoch (about 5.3 to 2.6 million years ago) or even later. Various types of limestone form the base of both islands. Raised sands and sandstones also occur, together with varied residual deposits similar to alluvial strata on the adjacent mainland. Extensive weathering of the limestones combined with erosion and earth movements have resulted in a variety of soils including red earths, loams, clays, and sands. Flat areas of coral limestone occur to the east, south, and north of Zanzibar and on the western islands. In places the coral is overlain by shallow red earth or alluvium.

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