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Puddingstone, or Pudding stone, is a conglomerate rock made up of a mixture of different, irregular sized grains and pebbles held together by a finer matrix, usually formed from quartz sand. The sedimentary rock is formed in river channels and may contain various minerals such as chromite, corundum, platinum, diamond, gold, sapphire, and zircon. Its name is said to derive from a resemblance to Christmas pudding. 
There are different types of puddingstone, with different makeup and geographical distribution. These include:
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Puddingstone_(rock)". A list of authors is available in Wikipedia.|