EXTINCT MONSTERS. 

 TABLE OF STRATIFIED ROCKS Continued. 



Systems. 



Formations. 



PERMIAN or 

 DYAS 



CARBONIFEROUS 



DEVONIAN & OLD 

 RED SANDSTONE. 



SILURIAN 



ORDOVICIAN 



CAMBRIAN 



Red Sandstone, Marl ) Zech- 



Magnesian Limestone, etc. / stein 

 Red Sandstone and Conglomerate 



Rothliegende 



Coal Measures and Millstone Grit 

 Carboniferous Limestone Series 

 Upper Old Red Sandstone 

 Devonian 



Lower Old Red Sandstone 

 Ludlow Series 

 Wenlock Series 

 Llandovery Series 

 May Hill Series 

 Bala and Caradoc Series 

 Llandeilo Series 

 Llanvirn Series 

 Arenig and Skiddaw Series 

 Tremadoc Slates 

 Lingula Flags 

 Menevian Series 

 Harlech and Longmynd Series 



EOZOIC- 



ARCH.EAN 



f! Pebidian, Arvonian, and Dimetian 

 \ ! Huronian and Laurentian 



Dominant 

 type, 

 Fishes 



Dominant 

 type, In- 

 vertebrata 



