Section of alluvium at the Blue Ribbon Mine in Alaska

Alluvium deposits in the Gamtoos Valley in South Africa

Alluvium (from the Latin, alluvius, from alluere, "to wash against") is soil or sediments deposited by a river or other running water. The Republic of South Africa (also known by other official names) is a country located at the southern tip of the continent of Africa Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Soil, often typeset as SOiL, is a four piece rock band from Chicago Illinois United States founded by Shaun Glass Tom Schofield Tim King and Adam Zadel Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of Alluvium is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand and gravel. Silt is Soil or rock derived Granular material of a Grain size between sand and clay Clay is a naturally occurring material composed primarily of fine-grained Minerals which show plasticity through a variable range of Water content, and Sand is a naturally occurring Granular material composed of finely divided rock and Mineral particles Gravel is rock that is of a specific Particle size range In Geology, gravel is any loose rock that is larger than two millimeters (2mm

Flowing water associated with glaciers may also deposit alluvium, but deposits directly from ice are not alluvium (see glacial till). Till is unsorted glacial sediment Glacial drift is a general term for the coarsely graded and extremely heterogeneous Sediments of glacial origin

A river is continually picking up and dropping solid particles of rock and soil from its bed throughout its length. Where the river flow is fast, more particles are picked up than dropped. Where the river flow is slow, more particles are dropped than picked up. Areas where more particles are dropped are called alluvial or flood plains, and the dropped particles are called alluvium. ||-||-||-||-||-||-||-||}A floodplain, or flood plain, is flat or nearly flat land adjacent to a Stream or River that experiences occasional or periodic

Even small streams make alluvial deposits, but it is in the flood plains and deltas of large rivers that large, geologically-significant alluvial deposits are found. ||-||-||-||-||-||-||-||}A floodplain, or flood plain, is flat or nearly flat land adjacent to a Stream or River that experiences occasional or periodic A delta is a Landform where the mouth of a River flows into an Ocean, Sea, Estuary, Lake or another river

The amount of solid matter carried by a large river is enormous. The names of many rivers derive from the color that the transported matter gives the water. For example, the Huang He in China is literally translated "Yellow River", and the Missouri River in the United States is also called Big Muddy. The Yellow River or Huang He / Hwang Ho ( Hatan Gol Queen river) is the second-longest river in China (after the Yangtze River) and the It has been estimated that the Mississippi River annually carries 406 million tons of sediment to the sea^[1], the Huang He 796 million tons, and the Po River in Italy 67 million tons^[2]. The Mississippi River is the second longest River in the United States, with a length of from its source in Lake Itasca in Minnesota to The Yellow River or Huang He / Hwang Ho ( Hatan Gol Queen river) is the second-longest river in China (after the Yangtze River) and the The Po ( Latin: Padus, Po Ligurian: Bo, Greek: Eridanus) is a river that flows 652 km(405 miles (682 km by considering

Alluvium often contains valuable ores such as gold and platinum and a wide variety of gemstones. Gold (ˈɡoʊld is a Chemical element with the symbol Au (from its Latin name aurum) and Atomic number 79 Platinum (ˈplætɪnəm is a Chemical element with the Atomic symbol Pt and an Atomic number of 78 A gemstone or gem, also called a precious or semi-precious stone, is a piece of attractive Mineral, which &mdash when cut and polished &mdash Such concentrations of valuable ores is termed a placer deposit. An ore is a volume of rock containing components or Minerals in a mode of occurrence that renders it valuable for mining In Geology, a placer deposit or placer is an accumulation of valuable minerals formed by deposition of dense mineral phases in a trap site

Throughout history, many shallow lakes have been filled in with alluvium to leave fertile plains (alluvial soils are often very fertile). Fertility is the natural capability of giving life As a measure "Fertility Rate" is the number of children born per couple person or population The alluvial mud annually deposited by the Nile has enabled the Egyptians to grow crops since at least the 4th millennium BC without artificial fertilization. The Nile (النيل, Ancient Egyptian iteru or Ḥ'pī, Coptic piaro or phiaro) is a major north-flowing River Ancient Egypt was an Ancient Civilization in eastern North Africa, concentrated along the lower reaches of the Nile River in what is now The 4th millennium BC saw major changes in human culture It marks the beginning of the Bronze Age and of Writing.

Since the construction of the Aswan Dam on The Nile in Egypt, 95% of the alluvium deposits at the mouth of the Nubia-Nasser Lake are gone, thus depriving the Nile delta of its fertility. Aswan (Assuan is a city on the first cataract of the Nile in Egypt. The Nile (النيل, Ancient Egyptian iteru or Ḥ'pī, Coptic piaro or phiaro) is a major north-flowing River This article is about the country of Egypt For a topic outline on this subject see List of basic Egypt topics. The Nile Delta ( Arabic: دلتا النيل) is the delta formed in Northern Egypt ( Lower Egypt) where the Nile River spreads Since 1964, 3. 8 billion cubic meters of sediments have deposited in this man-made lake. Proposals have been made to dredge this alluvium and pump it in slurry pipelines to shore where it can be used to fertilize the desert. ^[3]

References

• "Dennis Garrett", [Blue Ribbon Mine, Alaska]

See also

• Alluvial desert
• Alluvial fan
• Alluvial plain
• Alluvion
• Colluvium
• Eluvium
• Fluvial
• Illuvium