Environmental Thesaurus

Last uploaded: September 14, 2024
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ID

http://vocabs.lter-europe.net/EnvThes/20922

Preferred Name

silt

Definitions

[ ENM ][ ECSO ] Silt is granular material of a size somewhere between sand and clay whose mineral origin is quartz and feldspar. Wikipedia: In the Udden-Wentworth scale (due to Krumbein), silt particles range between 0.0039 to 0.0625 mm, larger than clay but smaller than sand particles. ISO 14688 grades silts between 0.002 mm and 0.063 mm. In actuality, silt is chemically distinct from clay, and unlike clay, grains of silt are approximately the same size in all dimensions; furthermore, their size ranges overlap. Clays are formed from thin plate-shaped particles held together by electrostatic forces, so present a cohesion. According to the U.S. Department of Agriculture Soil Texture Classification system, the sand-silt distinction is made at the 0.05 mm particle size. The USDA system has been adopted by the Food and Agriculture Organization (FAO). In the Unified Soil Classification System (USCS) and the AASHTO Soil Classification system, the sand-silt distinction is made at the 0.075 mm particle size (i.e., material passing the #200 sieve). Silts and clays are distinguished mechanically by their plasticity.

In Schemes
Type

http://www.w3.org/2004/02/skos/core#Concept

creator

herbert.schentz@umweltbundesamt.at

definition

[ ENM ][ ECSO ] Silt is granular material of a size somewhere between sand and clay whose mineral origin is quartz and feldspar. Wikipedia: In the Udden-Wentworth scale (due to Krumbein), silt particles range between 0.0039 to 0.0625 mm, larger than clay but smaller than sand particles. ISO 14688 grades silts between 0.002 mm and 0.063 mm. In actuality, silt is chemically distinct from clay, and unlike clay, grains of silt are approximately the same size in all dimensions; furthermore, their size ranges overlap. Clays are formed from thin plate-shaped particles held together by electrostatic forces, so present a cohesion. According to the U.S. Department of Agriculture Soil Texture Classification system, the sand-silt distinction is made at the 0.05 mm particle size. The USDA system has been adopted by the Food and Agriculture Organization (FAO). In the Unified Soil Classification System (USCS) and the AASHTO Soil Classification system, the sand-silt distinction is made at the 0.075 mm particle size (i.e., material passing the #200 sieve). Silts and clays are distinguished mechanically by their plasticity.

prefLabel

iszaptalaj

(φυσική) ιλύς

dumblas; sąnašos

sedimente fine

légamo

tolm (pedol), möll (geol), aleuriit

silt

Тиня, утайка, нанос

Schlick

slib

mulj

limon

mulj

siltti, muta, pohjalieju

limo

غرين

nogulumi; sanesas

naplavenina

mjäla

silt

silt

muł

naplavenina

sedimentos finos

created

2016-03-31

broader

http://vocabs.lter-europe.net/EnvThes/24

modified

2023-01-13

exactMatch

http://purl.obolibrary.org/obo/ENVO_01000016

http://www.eionet.europa.eu/gemet/concept/7698

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