Alectryonia Oyster Fossil Whitby Cretaceous

Cretaceous

Gerastos Tuberculatus Marocensis trilobite

Size: Length 6

these geodes look like a fairly ordinary bolder when their two parts are put together

Measurements are approximate and the minimum size you should expect your fossil to be

Alectryonia Oyster Fossil Whitby CretaceousOyster fossil of the species Alectryonia. With its distinctive zig zag shell edge, it is thought that like modern oysters, Alectryonia would have lived in shallow coastal waters and been a filter feeder. The angled joints between the oyster's two shells worked as a great defence against debris entering the oyster and damaging its soft body. From Tulear, Madagascar. Cretaceous, circa 95 million years old. Minimum size Length 9cm Height 5cm Depth 3cm