A Field Guide to Geophysics in Archaeology by John Oswin

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By John Oswin

This specific paintings examines the technology of geophysics operations in archaeology and offers non-specialist scholars either the boldness and the competence to establish and perform their very own surveys.

A box consultant to Geophysics in Archaeology

• explains the procedures fascinated by transparent and obtainable language;

• supplies a step by step consultant to establishing and undertaking a survey;

• demonstrates the appliance of technological know-how to instruments;

• supplies examples of result of surveys and indicates the right way to interpret

them;

• explains soil stipulations measured via the strategies and relates

them to archaeological features.

With many illustrations to give an explanation for the textual content and methods, this publication should be a useful source for experts and non-specialists in archaeological geophysics alike.

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Extra resources for A Field Guide to Geophysics in Archaeology

Sample text

If you have a series of probes spaced along a line, you can measure resistance between each pair of probes, whether they be next to each other or with a few metres between them. 5). Those pairs of probes next to each other only see objects very near the surface. Those with moderate spacing look from surface to mid depth, and the widest-spaced pair look to maximum depth. You can subtract the near surface measurement from the mid depth measurement to see what is at mid depth, and subtract this from deepest measurement to see what lies below mid depth.

8 shows a typical output. 8 Computer output from a caesium magnetometer looks similar to that from a fluxgate device, but it can detect tinier anomalies. There are more sophisticated types, some of which even use superconductivity at very low temperatures, and these have to be towed on long trailers behind a car. They use a twin sensor pack and each picks up the magnetism of the car equally, so that this effect is cancelled out. This is going to very sophisticated levels, beyond the scope of this book.

As a newcomer, this is the method you are most likely to meet. It may seem unwieldy at first having to trail a cable to distant probes, but it makes the frame lighter and easier to push into the ground, and also gives results which are easier to interpret. When I just mention ‘res’, that will refer to a twin-probe device. 2 The twin probe arrangement actually uses four probes. It measures the voltage between two and the current through the other two. The current spreads out while it travels through the ground.

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