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Recognising dinosaurs
and other vertebrates
Dinosaur remains are not common. When they die, the bones usually become separated. The most you can expect to find are the vertebrae and teeth. The vertebrae are usually knobbly, dished discs that can measure many centimetres, or even tens of centimetres across.
The modern survivors of all of these include the crocodile and the turtle. Reptiles, however, are not used to date rocks, and it is extremely rare for complete skeletons to be found. Most finds of reptiles are simply of individual vertebrae, like the ones shown here.
In some special locations they can be seen in large numbers, for example, in Dinosaur National Monument, Colorado and Utah, USA.
(Left) A bone bed full of dinosaur remains.
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