Two more rather splendid giant erratics -- sent in by Phil Morgan, to whom many thanks. Great photos! These two are in the Aberdare Valley, and look as if they are made of Pennant Sandstone. The sedimentary structures are clearly seen. In this area the Welsh ice was flowing broadly southwards, carrying "Coalfield" and other erratics in fairly well defined valley glaciers. However, at some stages in the Quaternary the whole landscape was incorporated into the Welsh Ice Cap and was deeply inundated beneath southwards-flowing ice.
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My home town. Though, I don't know where they are. A Google Maps link would be nice.
Hello to Steve,
The stones known locally as'The Big Stones', are grouped about 70 metres off the road named Bwll Carnygelli between Nelson and Senghenydd, on Senghenydd Common.
Map Reference ST 11354, 92434 (51.62371, -3.28195).
Phil -- do you know about big erratics on Pontypool Mountain? I saw some references to them, but the info was rather vague. There seem to be some very big isolated boulders up there that can be seen on Google images.......
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