Anyone new to this blog or geophysics in archaeology is recommended to read the material on the “Geophysical survey in archaeology” page.
After three days of using the beast, the Earth Resistance team are feeling worn down. Not with the effort, but with boredom! We have completed a 60x40m block over the “House on the Hill” and that is enough. Tomorrow we return to “normal res” hoping to cover the same size area in a single day, but with just a single depth.
Some of you may remember that the Earth Resistance meter was brand new last year. The meter came with six steel probes to allow for various configurations, of which we have used three extensively, and three very occasionally. Clearly we have been busy if Fig. 1 is anything to go by.
A small problem with today’s Earth Resistance survey was resolved with some programming in the statistical programming language R. Here are the six depth slices along with the Wenner array image.
I am very pleased with the result, and it will be interesting to compare the images with the GPR time slices for approximately the same depths. I think we can safely say we have “done” the house on the hill.
The GPR completed another 40x80m block up on the hill to the south of us. Firstly, a composite of the time slices.
Despite some strong reflections, nothing much resolves itself into anything very intelligible. Slice 1 to 3 are basically the topsoil, and slice 10–12 are nonsense from the bottoms of the profiles. Slice 6 does show an empty space where the 1955 ditch is. A composite of days 8 and 9 in Google Earth, plus the mag, makes this quite clear.
As we get up here on the heights, there is less in the way of obvious buildings showing on the mag survey, but there are some intriguing enclosures. Elsewhere at Gorhambury was have found buildings in these areas not visible on the mag surveys. There next few days could be very interesting, or very disappointing!
Many thanks to Anne, Pauline, Jim, Adrian, Dave and Mike for all their help today.