Fossil dragonfly. A fossilized dragonfly preserved in rock. Fossilization occurs when an organism is buried and its body structures are slowly replaced by minerals, leaving an impression in the rock. Dragonflies are large carnivorous insects which catch other insects in mid-flight. Insects made their first appearance in geological history in the Devonian period, between 395 and 345 million years ago. This dragonfly lived in the Upper Jurassic period, 140 million years ago. The fossil comes from Kimmeridge, Solnhofen, Germany.
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