| http://www.w3.org/ns/prov#value | - They are bivalves and bore into soft rocks, such as chalk and clay; they live for eight years .. just in their hole! ??? but when they depart to higher horizons .. anemones, crabs and other molluscs move in.Piddock burrows, 1 inch or less, in calcic rock, coast Boulogne - Calais (France)The seaward edge of the chalk platform below the chalk cliffs are eroding into narrow gullies ??? wonderful hidi
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