There's a new post on Mike Pitts's blog called Digging Deeper.
In it, he refers to the strange idea (emanating from MPP and his colleagues) that the undulations within the confines of the Stonehenge Avenue are "periglacial stripes" and that the orientation of these stripes coincident with the solstice axis is responsible for the placing of Stonehenge where it is. I have always thought of that as a crazy idea, and Mike Pitts seems to think so too. Mike has some nice illustrations in his piece, and displays a proper degree of scepticism, but he still seems to accept the periglacial origin for these features, and also for other small rills which are now visible at the new Larkhill excavation.
There is nothing at Larkhill either to suggest a "periglacial" role in the formation of these rills, and the perfectly obvious explanation for all of them, as we have said over and again on this blog, is that they are simply solutional rills created by water moving downslope, possibly assisted by permafrost (which has the effect of reducing the infiltration of water into the ground).
It's very confusing to refer to patterned ground features like these as "periglacial" since there is no evidence at all of patterned ground processes at play, involving the lateral movement of particles into stripes of larger fragment sizes separated by stripes of fines.
Maybe some people just like the word "periglacial" because it sounds mysterious and scientific?