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Bottom left shows a piece of ironstone, while on the right the picture shows a coal seam and other strata exposed by scouring.
Both pictures taken at Blaenavon in Gwent.
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Blaenavon Scourings
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Bottom left shows a piece of ironstone, while on the right the picture shows a coal seam and other strata exposed by scouring. Both pictures taken at Blaenavon in Gwent.
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