Winkle Trail on Granodiorite

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Common winkle ploughing through sand and revealing rock surface

Winkle Trail 1 – Common gastropod winkle, Littorina littorea, ploughing a trail through a shallow sand deposit to reveal the colourful patterned surface of foliated fine-grained granodiorite of L’Ancresse type as it browses the biofilm on the rock at Pembroke Bay on the Channel island of Guernsey.

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