Earth history; Devonian

Click on a fossil Eusthenopteron sp Archaeopteris sp Goniatites sp. + Orthoceras sp Acervularia sp Spirifer sp Crossopterygii indet. Bothriolepis sp. Codiacrinus sp Stringocephalus sp Odontochile sp Calceola sp Devonian
In the Devonian, trees grew on the heights around low-lying swamp areas. Many of the plants developed seeds which could be dispersed by the wind. The road to dry land went from the sea through rivers and lakes, where the fishes could benefit from the plant remains washed out from the dry land. The vertebrates’ adjustment to life on land went slowly. The first terrestrial vertebrates were amphibians, but they looked more like crocodiles. Many were more than one metre long, with a large chest and a robust skeleton. These amphibians had legs and lungs developed from the fishes’ fins and swim-bladder. Their large teeth were used to catch fishes. 
List of contents in the Earth history; Devonian showcase

Klikk på en tidsperiode Prekambrium Kambrium Ordovicium Silur Devon Karbon Perm Kvartær Trias Jura Kritt Tertiær
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Publisert 18. mai 2011 16:00