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31/05/2011
As the Anglesey Walking Festival gets under way, Adam Walton pulls on his boots and sets off to explore the island's geology, including some of the oldest fossils on Earth.
Last on
Tue 31 May 201119:00
BBC Radio Wales Extra

As the Anglesey Walking Festival gets under way, Adam Walton pulls on his boots and sets off to explore the island's geology, including some of the oldest fossils on Earth.