>...I suspect that upturned turves were used continually as an outer skin throughout the building process, mainly to stop Silbury becoming a quagmire and melting like an ice cream when it rained.<
Very interesting VBB, very interesting. So, you reckon Silbury was turf-protected during its <i>construction</i>; but actually, why was Silbury constructed at all? You know, the Millennium Dome keeps springing to mind here and I wonder if Silbury wasn't built for some special reason and then allowed to just... mmm... mellow out? What if we're completely wrong about some of the mystical/astrological theories for constructing Silbury? What if, for example, we allow in the idea that it was built for just one special reason at just one special time? Everything before and afterwards then just 'pales' into insignificance... just like the Millennium Dome, or even the burial mound of a great leader perhaps (oops ;-)