alluvial sediment

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Noun1.alluvial sediment - clay or silt or gravel carried by rushing streams and deposited where the stream slows downalluvial sediment - clay or silt or gravel carried by rushing streams and deposited where the stream slows down
delta - a low triangular area of alluvial deposits where a river divides before entering a larger body of water; "the Mississippi River delta"; "the Nile delta"
placer - an alluvial deposit that contains particles of some valuable mineral
sediment, deposit - matter that has been deposited by some natural process
alluvial soil - a fine-grained fertile soil deposited by water flowing over flood plains or in river beds
References in periodicals archive ?
The location of the study area among three different main geological units of the Iberian Peninsula (Hercynian Iberian Massif, Tertiary Guadalquivir Basin and External Zone of the Alpine Betic Cordillera) allows to carry out a specific case study to reveal the role of the chemical and physical processes that affect Quaternary alluvial sediment composition (source-rock lithology changes, relief, drainage system, climate, tectonic environment, etc.
They interweave elements of his life story, strongly influenced by his physicist father Albert Einstein, with technical aspects of his chosen research field--the transport of alluvial sediment by flowing water--and with discussions of how that transport affects rivers and the interactions of humans with rivers.
The fourth deformational event has occurred form pliocene until Quaternary, the evidence of this event are: starting of Kahurak fault activity in the study area, displacement of streams and old fold axes, bending of the Nosratabad faulttrend in the north of the area, folding of Pliocene units and cutting of Quaternary alluvial sediment.
These materials are a combination of accumulated alluvial sediment, organic detritus from ditch vegetation and other organisms such as algae, and the materials remaining in the ditch following excavation.
Erosional events result in the accumulation of alluvial sediment at the base of the side slope.
Laki Formation (limestone, Marl and Calcareous Shale rocks) is indicated by reddish yellow to pale yellow color; the Tiyon Formation (shale, Nodular Limestone and Limestone) is indicated by reddish brown to pale green color; the Nari Formation (Limestone, sandstones and shale) is indicated by light brownish green to dark green color; Khirtar Formation (shale, limestone and marl) is indicated by reddish brown to light green color, (Manchar Formation Sandstone and pebbly Conglomerate) is indicated by light blue and reddish brown, while the alluvial sediments and recent deposits) are indicated by light purple, pale green and reddish brown color.
Organic carbon percent varied widely in these hetereogenous alluvial sediments.
The alluvial sediments and the alluvial fans rainfall water enters the aquifer have a considerable spread.
This is particularly true for New Brunswick, where many of the communities were settled along river valleys and coastal areas, which are underlain by thick deposits of glacial and alluvial sediments that can amplify ground motion.
Sampling and analysis of alluvial sediments are useful for the detection of natural and anthropogenic sources of pollution (6).
Preliminary investigations of the area have indicated the presence of alluvial sediments containing both gold and platinum.