Arrangement of Seashells 7 – Striped British bivalve shells. P1120843aBlog7
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Arrangement of Seashells 7 – Striped British bivalve shells. P1120843aBlog7
Jessica's Nature Blog 
do these have a name other than striped bivalves?
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I believe these shells were a mixture of the rayed trough shell (Mactra corallina) and the thick trough shell (Spisula solida) with the concentric stripes being an environmentally induced phenomenon of burial in deeper darker staining sediments during the winter months.
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