(1) Excavations in 1990 added weight to the idea that the horse dates from later prehistory as deposits of fine silt in the beak were scientifically dated to the early first millennium BC.(2) The towers fall, the rivers silt , the bridges crumble.(3) Tidal processes constantly winnow the substrate surface in the submerged mouthbar front, and resuspend mud and silt into the water.(4) However, in addition to that alluvium much of central Belfast is underlain instead by a deposit of soft grey mud, silt and fine sand with numerous sea shells, in particular oysters.(5) They carry silt which replenishes the topsoil and enables agriculture to flourish.(6) Water continuing out over the playa surface carries with it a quantity of fine sand, silt , and clay in suspension.(7) There it attaches to particles of minerals (sand, silt , and clay) and organic matter, forming clumps.(8) The way sand, silt and clay particles are grouped together in aggregates is called the soil structure.(9) Soil texture, or the proportion of sand, silt and clay particles, directly influences nutrient content, moisture and drainage.(10) The textures of soils reflect the proportion of sand, silt , and clay sizes within that portion of an inorganic soil fraction that is less than 2 mm.(11) This is soil whose properties are controlled equally by the percentages of clay, silt and sand particles.(12) It says the crop has triggered soil erosion, siltation of waterways, widespread use of toxic chemicals and pesticides and road building through some of the world's most delicate habitats.(13) Under the placic layers were 10s of meters of stratified glaciodeltaic sands and silts .(14) Soils are composed of Gilpin silt loam, a moderately deep, well drained soil with a lower subsoil of silty clay loam of the subgroup Typic Hapludult.(15) These units contain intercalated thin, discontinuous lenses of silts and mudstones, some displaying desiccation cracks.(16) The Gonubie River does not have a typically big flushing flow while silting in Transkei rivers is a result of ÔÇÿpoor land use practiceÔÇÖ.
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