TERTIARY AGE. 



like manner, throughout the province of Touraine, the first and 

 second Tertiary stages are absent, the third being deposited in 

 different localities upon the Azoic, Palaeozoic, the Jurassic, or the 

 Cretaceous formations. 



457. Palaeontological considerations supply other distinctions 

 between the Tertiary and inferior formations. Nearly 230 



Fig. 180. 



Vertus. 



. . Montmirail. 



.Montmartre. 

 . . . Paris. 



. . Clermont. 



II 



generic forms extinct at the close of the Cretaceous age, and 

 not appearing in the Tertiary age, constitute a distinguishing 

 characteristic between the two epochs. In like manner, at the 

 commencement of the human period, 1324 new generic forms were 

 created which had no previous existence, and which, not being 

 present in the Tertiary age, supply a distinction between it and 

 the human epoch. 



119 



