The character of the wall changes regularly as you walk along the path on the Rhossili headland towards Worms Head. The occasional limestone boulder in the drystone wall is crammed full of fossils, again mostly crinoids and corals in fragmentary state. In this particular stone some of the hollower areas of the rough surface have moss growing.
Jessica's Nature Blog 
The stories those stones tell!
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That is so true. Thanks, Central Ohio Nature.
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