From: ACW [acw@radley.org.uk]
Sent: 03 January 2012 10:49
To: Highland HER Support
Subject: Highland HER feedback on record MHG53307

I was able to excavate several sections of this circular feature in August, 2010. It is almost certainly natural.  The raised circle of sand overlies a layer of peat  about 0.1m thick dipping towards the centre of the circle. 
The peat close to the surface increased sediment fertility allowing more plant growth above it.  This in turn increased the entrapment of sand to create the circle visible from GoogleEarth.

Regards
Andrew Wallis