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Magnetometry

Magnetometry is one of a number of geophysical techniques employed in archaeological prospection to inform test trenching and excavation ahead of proposed development. The technique is used to map subtle contrasts in soil magnetism within the top 2m of the surface, enabling archaeologists to determine the precise location and extent of a diverse array of archaeological features including

  • Enclosure remains & expansive walled settlements
  • Hillforts & promontory forts
  • Henges, tumuli & ancient burial grounds (enclosed)
  • Military encampments
  • Castle foundations & ringworks
  • Ecclesiastical enclosures & deserted medieval villages
  • Geometric gardens & designed landscapes

See TARGET’s ‘Example Data’ page for images of archaeological remains successfully identified using magnetometry

  • TARGET ARCH GEO PAGE 3 MAGNETOMETRY GREYSCALE
    Greyscale of processed magnetometer data highlighting previously unrecorded enclosure (dynamic range -1.5/+2nT)
  • TARGET ARCH GEO PAGE 3 MAGNETOMETRY FIELDWORK
    Magnetometer survey in progress examining the site of a known building foundation.
  • MAGNETOMETRY
    Magnetometry greyscale, North Runway Project at Dublin Airport. In 2016 Target was commissioned by Dublin Airport Authority (DAA) to undertake the pre-construction archaeological geophysical survey for the entire project.