cm 



>* 



PICTORIAL REPRESENTATION OF THE SUCCESSIVE STRATA OF THE EARTH'S CRUST, WITH SUGGESTIONS OF 



CHARACTERISTIC FOSSILS 



E.g. Fish and Trilobite in the Devonian (red), a large Amphibian in the Carboniferous (blue). Reptiles in Permian (light red), the 

 first Mammal in the Triassic (blue), the first Bird in the Jurassic (yellow). Giant Reptiles in the Cretaceous (white), then follow the Ter- 

 tiary strata with progressive mammals, and Quaternary at the top with man and mammoth. 



