Fossil shark tooth

Fossil shark tooth

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Credit: GEOFF KIDD/SCIENCE PHOTO LIBRARY

Caption: Fossil shark tooth (Carcharias africana). Example of the tooth of this Eocene (60mya - 32mya) shark which is related to modern day Grey Nurse Sharks. The thin pointed shape of the tooth indicates a diet primarily of bony fish. Sharks first evolved in the Palaeozoic era (570-245 million years ago). Shark's skeletons are formed of cartilage, a less durable material than bone, consequently there are few fossils of prehistoric sharks. Their teeth are made of a bone-like, enamel-coated substance that is more readily fossilised.

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Keywords: animal, animals, biological, biology, carcharias africana, cut-out, cutout, enamel, eocene, extinct, fish, fish eating, fossil, fossil shark tooth, fossil vertebrate, fossilised, fossilized, fossils, mineralised, nature, palaeontological, palaeontology, paleontological, paleontology, portrait, prehistoric, prehistory, preserved, rock, shark, teeth, tooth, vertebrates, vertical, white background, zoological, zoology

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