Lake Ballivián
Appearance
Lake Ballivián was a vast inland sea that existed until the end of the Pleistocene. It covered what is now the Altiplano in the Andes. Its shoreline was about 45 metres higher than the present level of Lake Titicaca. As it drained, two smaller lakes were formed: Titicaca, on the Peru/Bolivia border, and Minchin, whose remnants today are Poopó and theSalar de Uyuni.