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' TABLE XIY. 



Systematic Survey of tlie Neptunian fossiliferous strata of the earth with 

 reference to their relative sectional thickness' (130,000 feet circa). 



IV. Caenolithic Strata, 

 circa 3000 feet. 



III. Mesolithic Strata- 



Deposits of the 

 Secondary Epoch, circa 



15,C03 feet. 



II. Palaeolithic Strata. 



Deposits of the 

 Primary Epocli, circa 



42,000 feet. 



I. Archilithic Strata. 



Deposits of the 



Primordial Epoch, circa/ 

 70,000 feet 



Pliocene, Miocene, Eocene. 



IX. Chalk System. 



VIII. Jurassic System* 



VII. Triassic System 



VI. Permian System. 



V. Coal System. 



IV. Devonian System. 



III. Silm-ian System, circa 

 22,000 feet. 



11. Cambrian System, circa 

 18,000 feet. 



I. Laurentian System, oirca 

 80,000 feet. 



