184 



GEOLOGY. 



to species analogous with those existing in the countries where 

 they are discovered. It is here only that we meet with human 

 remains, a fact clearly proving the recent appearance of Man 

 upon the earth. 



EXPLANATION OF THE STRATA. 



Massive granitic earth. 



Stratified granitic earth, disposed in beds or layers. 



Materials vomited by the central fire, and arranged either 

 at the surface or within the beds. They may be designated 

 by the following names : first and second epoch, plutonic 

 rocks (porphyry and serpentine); third epoch, volcanic 

 rocks (trachyte, basalt) ; fourth epoch, volcanic rocks (lava). 



Aquatic basins. 



