The remnants of an eroding ironpan or ferruginous hardpan, exposed on the shore at Broughton Bay, Gower, South Wales. This has probably been created by the decomposition of the overlying peat layer dating from the relatively recent Holocene period. It is in the peat that you can find the stumps of trees from a submerged forest.
See the related posts:
Submerged Forest at Broughton Bay
COPYRIGHT JESSICA WINDER 2013
All Rights Reserved
Jessica's Nature Blog 
That’s really interesting – and something I’d probably walk straight past, without realising its significance… RH
LikeLike
Yes, it has only taken me five years to realise its significance myself.
LikeLike