Geology

Zanzibar Island is the Indian Ocean Island that is situated on Swahili Coast just beside Tanganyika. The northern tip of the island is Unguja Island that is located 5.72 degrees south, 39.30 degrees east. The southernmost point of the Island is at 6.48 degrees south, 39.51 degrees east.
A narrow channel is separating the mainland of Tanzania and Zanzibar having the narrowest point of 36.5 kilometers. The length of the island is about 85 kilometers and the width is 39 kilometers. The total area covered by the island is 1,464 km2.