Phosphate deposits

A number of small hills dot the eastern shore of Lake Manyara in Tanzania, along East Africa’s Rift System. Each of the hills are composed of granitic rocks called kopjes, surrounded by a valuable resource – abundant phosphate deposits. Geologists studying them have determined that in the past they were islands during a time when Lake Manyara was larger. Flamingos built their nests on them and their droppings built up around the islands to depths of tens of meters. Since the flamingo diet is mainly…

Tanzania biogenic deposits phosphate