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Q&A What sort of white rock with lots of small holes is this?

This interesting pebble caught my eye the other day when I was wandering around on an Anglesey beach in Wales, UK but I haven't a clue what sort of rock it is and what has caused the little holes i...

1 answer  ·  posted 10y ago by System‭  ·  last activity 7y ago by System‭

Question sea fossil-identification