Lake Katam
Encyclopedia
The Lake Katam is one of the larger lakes in Ounianga Kebir, a lake system in the Borkou-Ennedi-Tibesti Region in north-east basin of the Chad
Chad
Chad , officially known as the Republic of Chad, is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest, and Niger to the west...

. These lakes are notable for their running in the north-south headlands, by the Trade wind
Trade wind
The trade winds are the prevailing pattern of easterly surface winds found in the tropics, within the lower portion of the Earth's atmosphere, in the lower section of the troposphere near the Earth's equator...

 are formed. They are the remnant of a much larger lake, that filled the basin during the so-called green Sahara-time
Neolithic Subpluvial
The Neolithic Subpluvial — sometimes called the Holocene Wet Phase — was an extended period of wet and rainy conditions in the climate history of northern Africa...

, which lasted from about BC 10000-1500.
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