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 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.

The meaning of LOESS is an unstratified usually buff to yellowish brown loamy deposit found in North America, Europe, and Asia and believed to be chiefly deposited by the wind.

Jul 3, 2024 · 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.

The Loess Plateau [a] is a plateau in north-central China formed of loess, a clastic silt-like sediment formed by the accumulation of wind-blown dust. It is located southeast of the Gobi Desert and is surrounded by the Yellow River. It includes parts of the Chinese provinces of Qinghai, Gansu, Shaanxi and Shanxi. [4]

Loess - Age, Origin, Deposits: For more than a century a number of partly conflicting and partly complementary hypotheses have been put forward to explain the origin of the silt fraction of loess.

Feb 1, 2020 · Loess is a loose aeolian deposit of yellowish silt-sized dust mostly formed during the Quaternary period. Generally, it has a homogenous and porous structure and consists primarily of quartz and felspar particles. Ancient Chinese scholars linked the formation of loess to wind-blown dust 2000 years ago.

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 ...

Nov 22, 2024 · Loess soil, formed by the tireless work of wind over millennia, is a unique and important geological resource. Its distinctive properties, global distribution, and varied impacts underscore its significance in the natural world.

Jan 1, 2016 · Loess is a homogeneous, typically nonstratified, porous, friable, slightly coherent, often calcareous, fine-grained, silty, pale yellow or buff, windblown (aeolian) sediment. Loess consists mainly of quartz particles predominantly of silt with subordinate grain sizes ranging from clay to fine sand (Muhs and Bettis, 2003 ; Pye, 1995 ; Smalley ...