Clay

Clay is a general term including many combinations of one or more clay minerals with traces of metal oxides and organic matter. Geologic clay deposits are mostly composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure.

Read more about Clay:  Formation, Definition, Grouping, Historical and Modern Uses

Famous quotes containing the word clay:

    The earth is covered thick with other clay,
    Which her own clay shall cover, heaped and pent,
    Rider and horse,—friend, foe,—in one red
    burial blent!
    George Gordon Noel Byron (1788–1824)

    When Nature was shaping him, clay was not granted
    For making so full-sized a man as she wanted,
    So, to fill out her model, a little she spared
    From some finer-grained stuff for a woman prepared,
    And she could not have hit a more excellent plan
    For making him fully and perfectly man.
    James Russell Lowell (1819–1891)

    Protoplasm, simple or nucleated, is the formal basis of all life. It is the clay of the potter: which, bake it and paint it as he will, remains clay, separated by artifice, and not by nature from the commonest brick or sun-dried clod.
    Thomas Henry Huxley (1825–1895)