Sentence Examples


  • Many shales contain great numbers of ovoid or rounded septarian nodules of clay ironstone.
  • In the neighbourhood of Nottingham, and other places in the Midlands, barytes forms a cementing material in the Triassic sandstones; amber-coloured crystals of the same mineral are found in the fuller's earth at Nutfield in Surrey; and the septarian nodules in London Clay contain crystals of barytes as well as of calcite.
 
 

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