Dry stone walls are a feature of the Gower Peninsula in South Wales, exhibiting many types of local rock, sometimes with fossils. It seems that the rougher surfaces of conglomerate rocks provide a suitable habitat for a greater range of lichen species than the limestone ones. [This series of photographs was taken beside the path from Rhossili village towards the Worms Head Causeway].
Jessica's Nature Blog 
What fantastic rocks and lichens! So glad you are sharing them.
LikeLiked by 1 person
Thank you, Linda.
LikeLike
I love seeing detail like this. Thank you.
Get Outlook for Android ________________________________
LikeLiked by 1 person