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Histories of Northamptonshire

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  • Fossil brachiopod Kallirhynchia sharpi. © NMAG

    Jurassic Fossil Kallirhynchia sharpi

    168 million years ago, Northamptonshire lay beneath a warm sea teeming with marine life, including this fossil brachiopod Kallirhynchia sharpi.

    168 million years ago Geologic to Prehistoric

  • Piece of Northamptonshire ironstone, from Irchester Country Park. © NMAG

    Ironstone

    Northamptonshire’s ironstone was formed from iron-rich sediments in the Jurassic period. Quarried since Roman times, ironstone has shaped our landscape, fuelled the county's industry and built our houses.

    175 million years ago Geologic to Prehistoric