Unconsolidated, silt-sized particles with accessory clay and sand particles that are deposited primarily by the wind. Loess that has filtered down into cracks in the lava and between the cinders provides the growth medium for vegetation.
A load of silt that is produced by the erosion of outwash and transported by wind. Much loess found in the Mississippi Valley, China, and Europe is believed to have been deposited during the Pleistocene Epoch.
1.)Unconsolidated, wind-deposited silt and dust. 2.)An extremely fertile, fine-grained loam composed of quartz, feldspar, hornblende, mica, and clay; deposited by the wind during the Pleistocene Age. It originates in arid regions from glacial outwash (Morris 1992).
A buff-colored, wind-blown deposit of fine silt, which is frequently exposed in bluffs with steep faces. The thickness can range from 6 to 30 m. The loess of the USA and Europe is thought to be the fine materials first transported and deposited by the waters of melting ice sheets during the glacial period. It was later blown considerable distances with, in some cases, deposition in lakes. The origin of Asiatic loess, however, is apparently wind-blown dust from central Asian deserts.
Unconsolidated, wind deposited sediment composed largely of silt-sized quartz particles (0.015-0.05 mm diameter) and showing little or no stratification. It occurs widely in the central USA, northern Europe, Russia, China, and Argentina. In all but China, it is evidently derived largely from reworked glacial outwash deposits.
Windblown glacial deposits, often covering vast areas. Made up largely of silt size, angular particles, with strong water holding ability. Extremely fertile and a major contribution to the highly productive agricultural lands of the Midwest to the south.
(approx: luss) A blanket deposit of buff-colored calcareous silt, homogeneous, non-stratified, weakly coherent, porous, and friable. A rude vertical parting allows it to stand in steep or vertical faces. Loess covers wide areas in Northern Europe, eastern China, and the Mississippi Valley. It is considered to be windblown dust of the Pleistocene age.
n. A widespread, loose deposit consisting mainly of silt; most loess deposits formed during the Pleistocene as an accumulation of wind-blown dust carried from deserts, alluvial plains, or glacial deposits.
Nonstratified sediment composed of silt-sized particles deposited by the wind. These windblown dust deposits were derived from glacial materials. Loess is found throughout Kansas but is especially common in the northeastern and northwestern parts of the state.
A uniform, porous, fine-grained, wind-blown deposit consisting predominantly of silt-sized particles, with smaller amounts of clay and fine sand. While the classical loesses of Europe, North America and China are commonly calcareous, most New Zealand loesses, being derived from greywacke detritus, are not.
Among the classifications of soil types, loess, from the German LÃ¶ss, and ultimately from Swiss German lÃ¶sch, loose; pronounced in several different ways in English (IPA: ]), it is a fine, silty, windblown (eolian) type of unconsolidated deposit; sometimes the term refers to the soil derived from it. It is derived from glacial deposits, where glacial activity has ground rocks very fine (rock flour). After drying, these deposits are highly susceptible to wind erosion, and downwind deposits may become very deep, even a hundred metres or more, as in areas of China and the midwestern United States.