Food Sources. Lutein and zeaxanthin are found together in many food sources. Dark green leafy vegetables are the primary source of lutein and zeaxanthin, but they are also present in lesser amounts in other colorful fruits and vegetables, such as broccoli, orange peppers, corn, peas, persimmons and tangerines.ark green leafy vegetables are the primary source of lutein and zeaxanthin, but they are also present in lesser amounts in other colorful fruits and vegetables, such as broccoli, orange peppers, corn, peas, persimmons and tangerines.
The land rises into the Ennedi and Wadai plateaus along the eastern border with Sudan, where elevations reach near 2000 ft (609 m). In the south, the forested land is nourished by the Chari and Logone Rivers. During the monsoon rains, Lake Chad often overflows, causing floods in the lowland depression of the south. The highest point of Chad is Emi Koussi, which rises 11,204 ft (3,415 m); the lowest point of the country is the Djourab Depression at 524 ft (160 m). 1  Landforms of Africa.
Today these domes form the five major peaks of the Henry Mountains. Erosion has now exposed the hardened diorite core of the mountains. The domed and arched sedimentary rocks are seen as flanks of the mountains range. Elevation in the area ranges from 3,700 feet at the north shore of Lake Powell to over 11,600 feet at Mt. Ellen.