Silt

siltysilt depositdesiltedsilted upfine particulate depositsfine-grained sedimentsilt depositionSilt-relatedsilt-rich
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar.wikipedia
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Sand

sand grainsandybeach sand
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar. In the Udden–Wentworth scale (due to Krumbein), silt particles range between 0.0039 and 0.0625 mm, larger than clay but smaller than sand particles.
It is defined by size, being finer than gravel and coarser than silt.

Clay

claysblue clayammonia-rich clays
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar. In the Udden–Wentworth scale (due to Krumbein), silt particles range between 0.0039 and 0.0625 mm, larger than clay but smaller than sand particles.
Silts, which are fine-grained soils that do not include clay minerals, tend to have larger particle sizes than clays.

Sediment

sedimentslake sedimentdregs
Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water (also known as a suspended load) and soil in a body of water such as a river.
For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation.

Soil

soilsdirtsoil moisture
Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water (also known as a suspended load) and soil in a body of water such as a river.
Soil texture is determined by the relative proportion of the three kinds of soil mineral particles, called soil separates: sand, silt, and clay.

Sedimentary rock

sedimentarysedimentary rockssediments
Sedimentary rock composed mainly of silt is known as siltstone.
Most geologists use the Udden-Wentworth grain size scale and divide unconsolidated sediment into three fractions: gravel (>2 mm diameter), sand (1/16 to 2 mm diameter), and mud (clay is

Loess

lössloess soilloess soils
Thick deposits of silty material resulting from deposition by aeolian processes are often called loess.
Loess is an aeolian sediment formed by the accumulation of wind-blown silt, typically in the 20–50 micrometer size range, twenty percent or less clay and the balance equal parts sand and silt that are loosely cemented by calcium carbonate.

Siltstone

siltstonessiltymetasiltstone
Sedimentary rock composed mainly of silt is known as siltstone.
As its name implies, it is primarily composed (greater than 2/3) of silt sized particles, defined as grains 2–62 μm or 4 to 8 on the Krumbein phi scale.

Grain size

particle sizeKrumbein phi scaleParticle size (grain size)
In the Udden–Wentworth scale (due to Krumbein), silt particles range between 0.0039 and 0.0625 mm, larger than clay but smaller than sand particles.
Granular material can range from very small colloidal particles, through clay, silt, sand, gravel, and cobbles, to boulders.

Mississippi River

MississippiMississippi ValleyMississippi Basin
Silt deposited by the Mississippi River throughout the 20th century has decreased due to a system of levees, contributing to the disappearance of protective wetlands and barrier islands in the delta region surrounding New Orleans.
Formed from thick layers of the river's silt deposits, the Mississippi embayment is one of the most fertile regions of the United States; steamboats were widely used in the 19th and early 20th centuries to ship agricultural and industrial goods.

Siltation

siltingsedimentationsilting up
When silt appears as a pollutant in water the phenomenon is known as siltation.
Siltation, or sans, is water pollution caused by particulate terrestrial clastic material, with a particle size dominated by silt or clay.

Aeolian processes

aeolianeolianwind erosion
Thick deposits of silty material resulting from deposition by aeolian processes are often called loess. The main process is abrasion through transport, including fluvial comminution, aeolian attrition and glacial grinding.
Most of the dust carried by dust storms is in the form of silt-size particles.

Unified Soil Classification System

soil typesoil's classification
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).

Noakhali District

Noakhali47Bhulua
In southeast Bangladesh, in the Noakhali district, cross dams were built in the 1960s whereby silt gradually started forming new land called "chars".
On three sides of Noakhali an alluvial plain that is inundated annually and fertilised by silt deposits from the Meghna estuary.

Nile

Nile RiverNile ValleyRiver Nile
Silt, deposited by annual floods along the Nile River, created the rich, fertile soil that sustained the Ancient Egyptian civilization. The fertile black silt of the Nile river's banks is a symbol of rebirth, associated with the Egyptian god Anubis.
The Blue Nile, however, is the source of most of the water and silt.

Levee

dikedikesdyke
Silt deposited by the Mississippi River throughout the 20th century has decreased due to a system of levees, contributing to the disappearance of protective wetlands and barrier islands in the delta region surrounding New Orleans.
Because flood discharge intensity increases in levees on both river banks, and because silt deposits raise the level of riverbeds, planning and auxiliary measures are vital.

Nonpoint source pollution

nonpoint sourcenonpoint sourcesnon-point sources
Sediment (loose soil) includes silt (fine particles) and suspended solids (larger particles).

Anubis

AnpuAntubisAnubian
The fertile black silt of the Nile river's banks is a symbol of rebirth, associated with the Egyptian god Anubis.
Being the color of the fertile silt of the River Nile, to Egyptians, black also symbolized fertility and the possibility of rebirth in the afterlife.

Granular material

granulesgranulargranular flow
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar.

Mineral

mineralsmineral depositsaccessory mineral
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar.

Quartz

rock crystalquartz crystalcitrine
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar.

Feldspar

alkali feldsparfeldspathicfeldspars
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and feldspar.

Suspension (chemistry)

suspensionsuspensionsaqueous suspension
Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water (also known as a suspended load) and soil in a body of water such as a river.

Body of water

bodies of waterwater bodieswaterbodies
Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water (also known as a suspended load) and soil in a body of water such as a river.

Mudflow

mudslidemudslidesmud flow
It may also exist as soil deposited at the bottom of a water body, like mudflows from landslides.

Landslide

landslideslandslipdebris avalanche
It may also exist as soil deposited at the bottom of a water body, like mudflows from landslides.