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Tephra Separation laboratory


Tephra Separation laboratory


Dr Emma Tomlinson


Museum Building, TCD

Activities supported:

Extraction of tephra (volcanic ash) shards from cryptotephra layers (ie not visible to naked eye) within marine, lacrustine and peat archives using:

  • Density separation using SPT heavy liquid
  • Wet sieving at 125, 80 and 25 micron
  • Tephra picking and mounting
  • Hand polishing


  • LW Scientific Ultra8Y centrifuge
  • Nikon Optiphot microscope
  • Warner M33 micromanipulator
  • Hotplates


Igneous rock samples or samples/items that may contain volcanic ash are not permitted in this laboratory.