Puddingstone (rock)

  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.^{[1] [2]}

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There are different types of puddingstone, with different makeup and geographical distribution. These include:

• Hertfordshire puddingstone, principally found in Hertfordshire, England
• Roxbury puddingstone, principally found in and around Boston, Massachusetts
• Plumstead Common has a fine example of puddingstone, probably left behind after the last Ice Age

References

1. ^ Puddingstone. Natural History Museum, London. Retrieved on August 31, 2006.
2. ^ Puddingstone. Government of Canada. Retrieved on April 10, 2007.