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Qu'est-ce (qui) est loess - définition

WINDBLOWN SEDIMENT

Loess soil; Loessic; Glacial loess; Loesses; Loess Plain; Loess Plains; Löss

loess

['l???s, l?:s]

¦ noun Geology a loosely compacted yellowish-grey deposit of wind-blown sediment.

Derivatives

loessial adjective

loessic adjective

Origin

C19: from Ger. Loss, from Swiss Ger. losch 'loose'.

Loess

·noun A quaternary deposit, usually consisting of a fine yellowish earth, on the banks of the Rhine and other large rivers.

Loess

Loess (, ; from ) is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. Ten percent of Earth's land area is covered by loess or similar deposits.

https://en.wikipedia.org/wiki/Loess

Wikipédia

Loess

Loess (US: , UK: ; from German: Löss [lœs]) is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. Ten percent of Earth's land area is covered by loess or similar deposits.

Loess is a periglacial or aeolian (windborne) sediment, defined as an accumulation of 20% or less of clay and a balance of roughly equal parts sand and silt (with a typical grain size from 20 to 50 micrometers), often loosely cemented by calcium carbonate. Usually it is homogeneous and highly porous; it is traversed by vertical capillaries which permit the sediment to fracture and form vertical bluffs.

https://en.wikipedia.org/wiki/Loess

Exemples du corpus de texte pour loess

1. Yes, because there‘s too much loess A fine, rich yellow silt.

2. There were sand dunes that shifted from one shore to another, and loess deposits covered the northern Negev.

3. Such is the fate of the eolianite ridge, known locally as reches hakurkar, the chromic luvisol (hamra) the costal dunes and the loess soil of the Negev.

4. However, whereas Kentucky‘s deposits are only a few meters in thickness, over 400 meters of loess blankets part of Gansu Province.

5. Our findings support the belief that early plant domestication and food production relied on millet crops in the semi–arid Loess Plateau region of China.