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23 de may. de 2024 · The Sahara, Morocco. The principal topographical features of the Sahara include shallow, seasonally inundated basins (chotts and dayas) and large oasis depressions; extensive gravel-covered plains (serirs or regs); rock-strewn plateaus (hammadas); abrupt mountains; and sand sheets, dunes, and sand seas ( ergs ).
- People
Sahara - Nomads, Bedouins, Tuareg: Although as large as the...
- Plant Life
Sahara - Flora, Fauna, Ecosystems: Saharan vegetation is...
- Drainage
Sahara - Drainage, Oases, Rivers: Several rivers originating...
- Animal Life
Sahara - Wildlife, Reptiles, Mammals: Relict tropical fauna...
- Economy
Sahara - Oases, Nomads, Trade: During the century of...
- Qattara Depression
Qattara Depression, arid Libyan Desert (Eastern Saharan)...
- People
Hace 2 días · A satellite image of the Sahara by NASA WorldWind. The Sahara covers large parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Niger, Western Sahara and Sudan, and parts of southern Morocco and Tunisia. It covers 9 million square kilometres (3,500,000 sq mi), 31% of the African continent.
Hace 2 días · Desert soils. Sandy soils are composed of microparticles that make up sand. Deserts typically show three different types of soil: Sandy soils. They are composed mainly of small, granular sand particles. As sand grains do not adhere to each other, they are easily transported by the wind, which may cause large dunes to form.
19 de may. de 2024 · Sahel, semiarid region of western and north-central Africa extending from Senegal eastward to Sudan. It forms a transitional zone between the arid Sahara (desert) to the north and the belt of humid savannas to the south. Learn more about the Sahel here.
3 de may. de 2024 · Sonoran Desert, arid region covering 120,000 square miles (310,800 square km) in southwestern Arizona and southeastern California, U.S., and including much of the Mexican state of Baja California Sur, part of Baja California state, and the western half of the state of Sonora.
23 de may. de 2024 · A desert is a landscape where little precipitation occurs and, consequently, living conditions create unique biomes and ecosystems. The lack of vegetation exposes the unprotected surface of the ground to denudation. About one-third of the land surface of the Earth is arid or semi-arid.
23 de may. de 2024 · Soils and Desert Life. Soils of the desert teem with living things. Plant life ranging from single-celled cyanobacteria to giant saguaro reside on and in the soil. Tunneling termites and burrowing mammals turn over the soil. The activity of some organisms is very ephemeral and occurs in a short span of time after rains.
