Geophysics

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Effective non-intrusive method to evaluate buried archaeology and warn of potential risks to development

 

What is Geophysics?

Geophysics or geographical survey is a valuable tool used in advance of intrusive techniques. It can establish the nature and extent of buried archaeology faster and more economical than trial trenching. Based on identifying and assessing geophysical anomalies in the soil, the production of a broad picture of embedded features across a site can help to ascertain the state of archaeological preservation. This targets and potentially reduces further investigation.

How is it done?

Effective geophysical survey depends on the nature of the site, especially its geology. Our consultants always use methods and equipment that will produce the best possible results. Techniques include magnetometry, measuring the differences in the earth’s magnetism across the soil of the site, and resistivity, variations in the structural and chemical make-up of the soil or materials buried in it show as changes in resistance to an electrical current. By using multiplexing hardware, this method can reveal archaeological deposits at different depths, even under normally masking anomalies.

When do you need Geophysics?

Geophysics can be combined with other non-intrusive survey techniques for early assessment of a site, or be included in a comprehensive historic landscape model.