Developments in archaeomagnetic dating in britain
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A material that obtains a record of the Earth's magnetic field through the application of heat is said to hold a thermo-remanent magnetisation (TRM) signal.
However, as discussed below the precision of the date obtained will vary according to the period.
Samples of robust fired materials are usually taken by attaching a 25mm flanged plastic reference button to a cleaned stable area of the feature using a fast setting epoxy resin or encasing part of the feature in plaster of Paris (Clark 1988).
A number of methods of curve production were examined, particularly 'moving window' smoothing, which provided a rigorous, mathematical approach and produced a curve with realistic error bounds.
Archaeomagnetism is a method for dating fired materials and sediments from archaeological sites, based on changes of the Earth’s magnetic field in the past.