What is Loess?

Sight is mineral mud, made by glaciers and wind, which form rare ecosystems. Seless, pronounced "luss", consists of hills, mountains, bluffs and gulleys during the slow process of its deposit and relatively fast erosion. The Greeks and the plateau of the splendor provide very rich land, ideal for agriculture and beautiful, recognizable topographic features. LOESS has a small amount of clay, so it's not sticky as sediment, but rather slippery; Therefore, it disrupts much faster than other types of soil. The central and northwestern regions of the United States, Ukraine, Eastern China and Eastern and Central Europe have significant loess deposits. Agriculture was beneficial in these areas because prehistoric people used rich topsoil to grow crops. These rare geographical places, separate thousands of kilometers, share a similar geological history.

migrating, melting glaciers and high winds formed loess in front of thousands ofCI years after the last ice age. First, the glaciers scratched the rocks along the huge beds, relaxed and grinding rocks on the mineral particles. Then the melting glaciers werehed these residues along the channels to low -laid areas and flood plains. Finally, as the ground temperature continued to rise, this lake dried the mud. In the end, the fast wind carried light, powdered sprays in drifts that lay into bluffs, hills and mountains. That is why geologists refer to the creation of loess as eolian or made by wind.

Loess deposits form remarkable, remarkable landscapes such as forming loess Iowy. There we see Ridged Hills, steep drops, deep drains, jagged combs and ambling spurs. From the air, the wedge -like mountain belts route history of the wind direction. Different layers, from separate cycles of floods and blowing, report geologists about the country's past. In Iowa, their deposits differ from only 12,000 years 160,000 years ago. The loess depth reaches 300 feet (91 m) in some areas. ChineseThe Shaanxi area has a much deeper loess platform, up to 1,000 feet (305 m) strong, even if they show much more erosion.