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Related to silt: silt soil


predominantly quartz mineral particles that are between sand size and clay size, i.e., between 1-16 and 1-256 mm ( 1-406 – 1-6502 in.) in diameter. Silt, like clay and sand, is a product of the weathering and decomposition of preexisting rock. Hardened silt forms a sedimentary rock called siltstone, which tends to deposit in thin layers sometimes referred to as flagstone because it is hard, durable, and flat, breaking into nearly rectangular slabs.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the fine-grained, soft sediment on the bottom of bodies of water, not altered by diagenesis. Between 30 and 50 percent of the particles it contains are less than 0.01 mm in size. Occurring in a fluid state under natural conditions, it assumes the properties of a solid body when dry. On the bottom of seas and continental bodies of water (lakes, rivers, and ponds) there are silts consisting of fine-grained products of rock decomposition (terrigenous, clayey, and lime silts) and silts made up of microscopic shells or the skeletal remains of marine organisms (globigerina, diatomaceous, radiolarian, pteropod silts). Silts that have been enriched by volcanic ash (volcanic mud) form a separate category. Sometimes silts are enriched with organic matter (sapro-pel) whose decay causes hydrogen sulfide contamination or putrefaction (“putrid silt”).

Some silts, including lake, pond, and lagoon silts, are used as fertilizer and for mineral feed supplements for livestock; they are also used in medicine, for pelotherapy.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


A rock fragment or a mineral or detrital particle in the soil having a diameter of 0.002-0.05 millimeter that is, smaller than fine sand and larger than coarse clay.
Sediment carried or deposited by water.
Soil containing at least 80% silt and less than 12% clay.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

silt, inorganic silt, rock flour

A granular material that is nonplastic or very slightly plastic and exhibits little or no strength when air-dried; usually has a grain size between 0.002 mm and 0.05 mm in diameter.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


a fine deposit of mud, clay, etc., esp one in a river or lake
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Maintenance of a silt fence is a problem that is obvious to even casual observers.
3.6g silt x 1500 [cm.sup.2] [g.sup.-1] = 5400 [cm.sup.2]
A Denbighshire County Council spokesperson said: "We have been monitoring the silt deposits in the harbour and conditions have remained stable throughout construction to completion of the work.
A Bridgend County Borough Council spokesman said: "Arrangements for the removal of the silt are about to be concluded and signage will shortly be erected at the site to advise that a contractor has been appointed.
He claimed the silt pile is a direct result of the council "not having a plan B" after two supermarkets pulled out of deals to develop the site.
'It was observed that weirs situated on Lath Nullah, Konkar Nullah and Thado Nullah were filled with silt accumulation, reducing the active storage capacity of these structures.
Owing to heavy rains in the region, the machines for electricity production were shut down on Sunday morning as silt level increased exponentially in the river.
M2 PRESSWIRE-August 9, 2019-: Global Silt Curtain Market Growth Report by Supply, Demand, Consumption, Sale, Price, Revenue and Forecast to 2025
The silt has created islands in the river just before the barrage.