Fossil shark tooth (Carcharias vincentii). Example of the tooth of this Eocene (60mya - 32mya) shark which is related to modern day Grey Nurse Sharks.

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Fossil shark tooth (Carcharias vincentii). Example of the tooth of this Eocene (60mya - 32mya) shark which is related to modern day Grey Nurse Sharks. The pointed shape of the tooth indicates a diet probably consisting 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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Size: 2709px × 4064px
Photo credit: © GEOFF KIDD/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: bedding, biological, biology, botanical, botany, congestiflora, dense-flowered, flower, flowering, flowers, gymnocephala, late, loosestrife, lysimachia, nigropunctata, spring, summer, yellow