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how is chalk formed

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Chalk - Wikipedia, the free encyclopedia
Chalk is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. Calcite is calcium carbonate or .

Chalk Group - Wikipedia, the free encyclopedia
The Needles, part of the extensive Southern England Chalk Formation. The Chalk Group (often just called the Chalk) is a lithostratigraphic unit (a certain number .

Chalk -
How Products are Made - Chalk. . Chalk was first formed into sticks for the convenience of artists. The method was to grind natural chalk to a fine powder, then .

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        DISCOVERING FOSSILS | What is chalk and how does it form?
        A guide to chalk including how it formed, where you can find it and it's scientific and practical uses.

      • 2

        How is Chalk Formed | Ask Kids Answers
        Chalk is a soft, white, sedimentary rock, made from limestone. It forms in deep marine conditions in oceans. The gradual accumulation of min ... view more.

      • 3

        Chalk is formed from the skeletons of tiny animals called foraminifera. Foraminifera lived and died millions of years ago. When they died, their skeletons fell to .

        Chalk - Geology Shop
        When writing on the formation and composition of Chalk the online version of Encarta states (as of March 2001) that 'Chalk rocks, such as the White Cliffs of .

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        How was Chalk formed? - the White Cliffs Countryside Partnership
        White Cliffs Countryside Project article: - Chalk rock (calcium carbonate), a pure form of limestone formed in warm, tropical seas about 100 million years ago in .

        Geology Chalk
        Chalk is a very pure form of limestone. The chalk in Northern Ireland was laid down in the Cretaceous Period which lasted from 135 Million Years ago to 65 .

      • 5

        How is Chalk Made? -
        Chalk is actually made from rock! Chalk is a soft porous rock which is formed from limestone and composed of mineral calcite. Chalk also con... view more.

      • 6

        Geological Society - Chalk cliffs, Sussex
        Chalk is a pure white limestone formed from the remains of tiny marine organisms . As chalk formed from the mud, layers and lumps of hard, glassy flint also .

      • 7

        Chalk, Sandstone, Limestone Formations & Fossils in the Smoky ...
        The younger Greenhorn Limestone, and youngest (70-80 million years) Niobrara Chalk were formed by sediment in deeper portions of the sea. Both have given .

    Tips & Warnings

    • Old Harry Rocks - The end of the story - Jurassic Coast
      The striking white chalk of Old Harry Rocks formed towards the very end of the cretaceous period over 65 million years ago. Chalk is almost pure limestone, .

    • White Cliffs of Dover - Answers in Genesis
      Aug 21, 2008 . Many secular geologists claim that these chalk beds speak of an old earth since they believe chalk formed slowly and progressively over .

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