Rose Geophysical Consultants


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Gradiometer Survey

Magnetometer Survey Susan Ovenden



Gradiometry Interpretation


Of all the available geophysical techniques, gradiometry is the most time and cost effective.  As such it is the industry standard and usually the technique of first choice in archaeological evaluations.

Gradiometry detects extremely small variations in the earth's magnetic field and is set up to remove the earth's field sensing only local changes.  It is excellent for locating ditches, pits, middens, hearths, kilns and, depending on the soils and materials used, will often show walls and foundations.

There has been much discussion about the efficacy of gradiometry on igneous and metamorphic geology, for example parts of Scotland. However, there are few areas where this technique cannot be applied.

We use a Bartington Grad 601-2, which is actually two instruments together allowing for quicker survey times, with associated cost savings.

Appropriate application of gradiometer survey:

Archaeological Evaluations to locate and identify:

      • Ditches and pits
      • Metalled roads & trackways
      • Drains and gulleys
      • Pottery and tile kilns
      • Hearths and ovens
      • Ferrous debris including some slag

Environmental Assessments and Civil Engineering to locate and determine:

      • Buried metal objects
      • Buried storage tanks
      • Utilities


Bartington Grad601-2



Gradiometer Data


Gradiometer Survey | Resistance Survey | Ground Penetrating Radar Survey

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