Gradiometer survey of second mound

We were extremely fortunate with the weather yesterday whilst carrying out further survey work on the second possible long barrow (see Promising results from second gradiometer survey).  Progress was slow due to barbed wire fences and hedges crossing the survey area, as well as very rough ground.  Partial squares tested our ability to add dummy readings and dummy lines, but all worked out fine.

We have gradually added more small areas to the survey of this mound, and the picture is beginning to become much clearer, as shown below:

Gradiometer results for second mound

Gradiometer results for second mound

The width of the survey data is 80m.  There is a wide feature that flanks the mound, and which looks like a northerly ditch.  Things are less clear to the south.  A barbed wire fence crosses horizontally across the centre of the plot.

After finishing that survey, we thought we would try to locate a small ring ditch in the adjacent field, recorded as having an unusual shape.  With an imprecise coordinate, and an imprecise GPS position from my phone, we missed the feature completely in our first 20m square, but were successful second time around:

Small ring ditch

Small ring ditch

It isn’t that remarkable, although appears to have a gap to the west.

Today I returned the gradiometer to the New Forest National Park offices in Lymington, which draws to a close our survey work for now.  I thought it was worth including the surveys of our other sites in the fields adjacent to those above, as we are very pleased with the results.

Here is the survey from the first mound, which has all the indications of a classic long barrow.  The width of the plot is 80m.

Long barrow 1

Long barrow 1

Here are the results from the double ring ditch:

Double ring ditch

Double ring ditch

I have uploaded some photos to the AVAS Flickr site, here is one example:

AVAS Geophysics 13 Nov 2016

Thanks to everyone in AVAS for helping out with the surveys, to Bournemouth University for the load of the equipment, and to the New Forest National Park Authority for arranging the loan of the equipment.

 

 

 

 

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