edwin Rose is quite wrong about gorsedd circles - many are indeed formed of
stones very similar to those of ancient stone circles and I suspect that all
that distinguishes them is the freshness of the stone in that they haven't
had centuries of weather. But in terms of recognition consider this - the
recently scheduled gorsedd circle near pontypridd, constructed by iolo and
his chums, is i seem to remember, set around a "rocking stone" which is
itself possibly/probably a prehistoric monument - such a monumnet might
easily get confused with something from the bronze age.