I have been using a resistivity meter for the Bexley Archaeological Group and we recently

had the meter upgraded.

I thought it would be useful to test it out before putting it to use, I did two test grids in my back garden.

To my total surprise this was the result.

garden anomoly

The circle is 8 metres in diameter.

The darker line down the left hand side is the edge of a concrete path and the strong light patch in the lower left is a soakaway for a garage.

If anyone has any ideas, please let me know.