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| | Archaeology Wordsmith |
 | | There are ceramic clays, clay shales, mudstones, glacial clays, deep-sea clays, and soils -- which are plastic when wet and hard when dry. |
 | | This soft white clay is an essential ingredient in the manufacture of china and porcelain and is widely used in the making of paper, rubber, paint, and many other products. |
 | | till is sometimes called boulder clay because it is composed of clay, boulders of intermediate sizes, or a mixture of these. |
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