FIGURE 1. Map of the Chad basin showing the location of the Toros-Menalla area.
From the following article:
Geology and palaeontology of the Upper Miocene Toros-Menalla hominid locality, Chad
Patrick Vignaud, Philippe Duringer, Hassane Taïsso Mackaye, Andossa Likius, Cécile Blondel, Jean-Renaud Boisserie, Louis de Bonis, Véra Eisenmann, Marie-Esther Etienne, Denis Geraads, Franck Guy, Thomas Lehmann, Fabrice Lihoreau, Nieves Lopez-Martinez, Cécile Mourer-Chauviré, Olga Otero, Jean-Claude Rage, Mathieu Schuster, Laurent Viriot, Antoine Zazzo and Michel Brunet
Nature 418, 152-155(11 July 2002)
doi:10.1038/nature00880
The crossed line represents the Chad border. The boundaries of the ancient Lake Chad basin are shown as a dotted line (with northern and southern sub-basins divided by a dashed line). The inferred maximum extension of the Holocene 'Lake Mega Chad' is hatched in black; the small blue area within it corresponds to present-day Lake Chad. Red circle, the Toros-Menalla hominid site (TM 266); white circle, the Kossom-Bougoudi area; pink circle, Kollé area; blue circle, Koro-Toro area. Colours represent altitude: green, 280–430 m; yellow to grey, 430–850 m; brown, 850–2,000 m; grey-blue patches in Tibesti area, about 2,000–3,400 m.