Climate change and rising sea levels ... strong shells. Likewise, the researchers used the naturally existing dissolved ...

Sand, wind and water further erodes the ... Gastropods, such as sea snails, have one outer shell while bivalves, such as oysters, scallops and mussels, have two. As they grow, these animals ...

Biogenic sand is made up of bits of once-living organisms. Coral fragments are one contributor but foraminifera, mollusc shells and sea urchin spines are also common in biogenic sand. Beaches made of ...