Scientists at Curtin University have solved a long-standing mystery about how some of the world's best-preserved fossils formed in ancient oxygen-free ocean floor settings. The research, published in Communications Earth & Environment, focuses on a 183-million-year-old ichthyosaur—a dolphin-like marine reptile, preserved three dimensionally inside a carbonate concretion from Germany's Posidonia Shale.

Scientists at Curtin University have solved a long-standing mystery about how some of the world’s best-preserved fossils formed in ancient oxygen-free ocean floor settings. The research, published in Communications Earth & Environment, focuses on a 183-million-year-old ichthyosaur—a dolphin-like marine reptile, preserved three dimensionally inside a carbonate concretion from Germany’s Posidonia Shale.

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