Coastal shell fragments. Shells are grown by many marine invertebrates for protection. These are the shells of marine molluscs,and are formed from nacre,a combination of proteins and calcium carbonate. After the animal dies,the shells are broken up by wave action and eventually contribute to the composition of coastal sands. This sample is from Kelleys Island,Lake Erie,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Szoenyi, Michael |
Taille de l’image : | 4368 px × 2912 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |