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The giant Atlantic cockle is found offshore in deeper waters and must have been obtained along the beach. These five unmodified giant Atlantic cockle shells were found by Bill Birmingham stacked one atop the other at the Linn Lake site along the lower Guadalupe River. A similar cache of six cockle shells was found farther upstream at Morhiss Mound, suggesting that this pattern may represent ritual offerings. Photo by Steve Black, Museum of the Coastal Bend.
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