Quarternary do) 



Tertiary (9) - 



Cretaceous (8) . 



Jurassic (7) - 



Triassic(6) -j 

 Permian (5) { 



Carboniferous (4) * 



Devonian (3) 



Silurian (2) - 



Archean (i) 



Recent 



II 



Piocene 



Miocene 



Eocene Mammals 



Birds 



Reptiles 

 / 



Reptiles 



Amphibia 

 Coal Measures 



Sub Carboniferous 



Fishes 



Cenozoic 



Mesozoic 



Upper Silurian 



Vertebrates 

 Lower Silurian 



Invertebrates 



Cambrian 



Paleozoic 



No life 



FIG. 9. Diagram illustrating a section of the earth's crust to show the sue- 

 cession of the geological ages. 



