41.4 MB (935.3 KB compressed)
3402 x 4251 pixels
28.7 x 36.1 cm ⏐ 11.3 x 14.2 in (300dpi)
HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Fossil mollusc. Fossilised shell of a Hippurites radiosus rudist mollusc. Rudists were a group of prehistoric bivalve molluscs that had unusually-shaped shells. They first appeared during the Jurassic period (around 100 to 145 million years ago), and became so diverse during the Cretaceous period (around 145-85 million years ago) that they were major reef-building organisms.
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