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In Geology the term 'Chalk' refers to a soft, white, porous, limestone, sedimentary rock composed mainly of the mineral calcite.
It forms under relatively deep, quiet marine conditions from the gradual accumulation of minute calcite plates shed from planktonic microorganisms called coccolithophores.
It is common to find flint and chert nodules embedded in chalk because some of these coccolithophores also have siliceous exoskeletons.
The chalk in relatively thick layers deposited parallel to the earths surface and therefore appears in bands when exposed in outcrop. (In this respect it is little different form other sedimentary rock deposits).
What else can I help you with?
Where can chalk be found?
near a chalk board
Where is chalk?
Chalk is a type of limestone and found in limemud. It is also found at The White Cliffs of Dover in the south of England.
In which country is chalk found?
Chalk is found in various countries around the world, but one of the largest deposits is located in the United Kingdom. Other places where chalk can be found include France, Germany, and the United States.
Who found chalk?
John Chalkson.
What element is a solid found in marble limestone chalk and teeth?
Calcium is the element found in marble, limestone, chalk, and teeth.
Who is the inventor of chalk?
Chalk (calcium carbonate, CaCO3) is found in nature, being a natural product.
Where can marching bands be found?
Most marching bands are found at high schools or colleges.
Why are fossils not found in chalk?
Chalk is a fossil itself and chalk is soft, and so while you might form a fossil; in it, it would not remain. Within chalk there is often harder rock - which sometimes does contain fossils.
What is a chalk stream?
A chalk stream is a type of river or stream that flows over chalk bedrock or through chalk hills. These streams are known for their clear, alkaline water and are usually rich in flora and fauna. Chalk streams are found mainly in southern England.
Is the clarinet in bands or orchestras?
The clarinet can be found as part of bands and orchestras.
Is the chalk you find in nature the same as the chalk that you use on the board?
No, natural chalk found in nature is formed from the shells of marine organisms, while chalk used on chalkboards is typically made from gypsum or calcium sulfate. The chalkboard chalk is designed to have a smooth texture and be easily erased from chalkboards.
What is found in teeth chalk shells and limestone?
Calcium (20Ca)
