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Carboniferous or Tertiary

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5 locations recorded with this geological age.

  1. Bedford Park Visitor CentreAn erratic boulder of dolerite, found in glacial gravels at nearby Marks Warren, has been installed outside…IgneousDoleritenear Harold Wood
  2. Chesham High StreetSegments of the pedestrianised area paved with stone setts. The black setts are whinstone.IgneousDoleritenear Chesham
  3. Grove Road Car ParkA narrow lane next to the Masonic Hall, leading to a car park. 19th Century setts are preserved as paving,…IgneousDoleritenear Sutton
  4. Radcliffe SquareBlack sets on the path from the Radcliffe Camera to the Bodleian.IgneousDoleritenear Oxford
  5. WhinstoneReused cobbles of black dolerite, occurring mainly in the lower courses of the panels under the pub's windows.IgneousDoleritenear Totteridge & Whetstone