I found a strange reference to Garnwen, Brynberian. Here, on the south side of the road and about a km from Craig Rhosyfelin, there is a "record of a possible barrow." The grid reference is SN112351. Apparently there is no trace of any archaeological feature, but there is a scatter of white quartz fragments -- which presumably led somebody to think of Newgrange and a possible disappeared round barrow. Of course, it may simply be that in this area there is an outcrop of Fishguard Volcanics with a particularly rich concentration of white quartz veins........
Not sure if Richard Bevins and his colleagues have looked at this site during their field sampling of the local volcanic rocks.......
There's no doubt that quartz is associated with a variety of prehistoric monuments and activities but out of context it's pretty meaningless .And even in context too much emphasis may be put on it's presence .
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