Archaeomagnetic dating range


24-Jan-2020 22:20

Small beads of plasticine beneath the buttons held them steady while the resin cured.Finally, geomagnetic orientation arrows were marked using a Nautech fluxgate compass, along with a specimen code (it was not possible to use a sun compass at the time of sampling.) The set of orientation arrows were finally checked for parallelism to test for errors due to the bulk magnetisation within each feature; no significant flux distortion was detected in any of the kilns.From a study of the behaviour of the pilot samples, an alternating field of 2.5m T or 5m T was chosen which would provide for the optimum removal of secondary components of magnetisation in the remaining samples.

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Usually, a weak viscous magnetisation is also present, reflecting a tendency for the remanence to adjust to the recent field.Burnt or fired archaeological artefacts often retain a record of the magnetic field in which they were last heated and cooled.



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