Qattara Depression - Geography

Geography

The depression has the form of a teardrop with the point of the drop facing east and the broad deep area facing the south west. The northern side of the depression is characterised by steep escarpments up to 280 meters high, marking the edge of the adjacent El Diffa plateau. To the south the depression slopes gently up to the Great Sand Sea.

Within the Depression there are salt marshes, under the northwestern and northern escarpment edges, and extensive dry lakes (dry lake beds) that flood occasionally. The marshes occupy approximately 300 square kilometres (120 sq mi), although wind blown sands are encroaching in some areas. About a quarter of the region is occupied by dry lakes composed of hard crust and sticky mud, and occasionally filled with water.

The depression was formed by salt weathering and wind erosion working together. First the salts crumble the depression floor and then the wind blows away the resulting sands.

Read more about this topic:  Qattara Depression

Famous quotes containing the word geography:

    Where the heart is, there the muses, there the gods sojourn, and not in any geography of fame. Massachusetts, Connecticut River, and Boston Bay, you think paltry places, and the ear loves names of foreign and classic topography. But here we are; and, if we tarry a little, we may come to learn that here is best. See to it, only, that thyself is here;—and art and nature, hope and fate, friends, angels, and the Supreme Being, shall not absent from the chamber where thou sittest.
    Ralph Waldo Emerson (1803–1882)

    At present cats have more purchasing power and influence than the poor of this planet. Accidents of geography and colonial history should no longer determine who gets the fish.
    Derek Wall (b. 1965)

    The California fever is not likely to take us off.... There is neither romance nor glory in digging for gold after the manner of the pictures in the geography of diamond washing in Brazil.
    Rutherford Birchard Hayes (1822–1893)