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loess    音标拼音: [l'oəs]
n. 黄土

黄土

loess
n 1: a fine-grained unstratified accumulation of clay and silt
deposited by the wind

Loess \Loess\ (l[~e]e), n. [G. l["o]ss.] (Geol.)
A quaternary deposit, usually consisting of a fine yellowish
earth, on the banks of the Rhine and other large rivers.
[1913 Webster]


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  • Loess - Wikipedia
    A loess is a periglacial or aeolian (windborne) sediment, defined as an accumulation of 20% or less of clay with a balance of roughly equal parts sand and silt (with a typical grain size from 20 to 50 micrometers), [3][4] often loosely cemented by calcium carbonate
  • Loess | Wind-Deposited Sediment Soil Formation | Britannica
    Loess is a sedimentary deposit composed largely of silt-size grains that are loosely cemented by calcium carbonate It is usually homogeneous and highly porous and is traversed by vertical capillaries that permit the sediment to fracture and form vertical bluffs
  • Loess - National Geographic Society
    In some parts of the world, windblown dust and silt blanket the land This layer of fine, mineral-rich material is called loess Hikers climb the rolling ridges of the Loess Hills in the western part of the U S state of Iowa
  • Loess and Paleosols - National Centers for Environmental Information
    Loess are silt-sized particles deposited on the Earth's surface by winds Extensive loess deposits formed during the Ice Ages in areas bordering large, continental glaciers Paleosols are past soil horizons preserved in a geologic section, indicative of changes in variables such as temperature and precipitation
  • Loess records | U. S. Geological Survey - USGS. gov
    Loess is an eolian deposit, composed mainly of silt grains, which can be identified in the field as a distinct sedimentary body It covers a significant portion of the land surface of the Earth and is one of the most important terrestrial archives of long-term dust deposition
  • What is Loess? - Loess Hills Audubon Society
    Loess (pronounced "luss") is a German word meaning "loose" and it is the name of a type of soil Loess is a deposit of fine, yellowish-gray, clay-like sediment which can be found from north central Europe to eastern China and in the American Midwest
  • Loess Soil And Ground Fertility - WorldAtlas
    Loose and mineral loess are very suitable for intensive agriculture The looseness makes loess easy for cultivation operations, and ensures proper soil aeration and root growth Loess is able to retain enough soil moisture and provide adequate amounts of potassium and nitrogen for good crop growth
  • What is Loess? - Spiegato
    Loess, pronounced “luss,” forms hills, mountains, bluffs, and gulleys during the slow process of its deposit and relatively rapid erosion River valleys and plateaus of loess provide very rich soil, perfect for agriculture, and beautiful, recognizable topographical features
  • Loess - Deposits, Windblown, Soils | Britannica
    Loess - Deposits, Windblown, Soils: The world’s largest loess-covered areas lie between latitudes 55° and 24° N: in China on the banks of the Huang Ho; on the margins of the continental deserts of Inner Asia; in Central Asia in Kazakhstan, Uzbekistan, the foreland of the Tien Shan, and east of the Caspian Sea; and in Siberia along Lake
  • Loess - (Intro to Geology) - Vocab, Definition, Explanations - Fiveable
    Loess is a type of wind-blown silt that forms thick deposits and is often characterized by its fine texture and yellowish color It plays a significant role in soil formation and fertility, especially in regions with limited vegetation





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