234 NEOZOIC TIME. [CHAP. XT. 



of the French deposits that there was a gradual upheaval 

 of the whole area, and that the depressions of this terres- 

 trial surface were occupied by large lakes. Whether any- 

 such lakes existed on British ground we do not know, but 

 many were scattered through the centre of Europe, in 

 France, Switzerland, Germany, and Austria. 



