236 



DR. H. GADOW ON MEXICAN 



[June 6, 



Late Eocene, or early Oligocene, times mark a period of 

 considerable local subsidence which drowned the Antillean land, 

 or islands, except their summits. Late Oligocene, or early Miocene, 

 mark a period of considerable elevation with most important 



Text-fig. 32. 



17 



DURING MIOCENE 



V 



VI 



END OF MIOCENE 



EARLY 



Diagrams to illustrate the contours of Mexico at different geological ages. 



results : — Establishment of the continuity of North and Central 

 with South America, and a continuous mass of land from Central 

 America, north and eastwards, comprising the Greater Antilles 

 and the southern end of Florida. For this Central Land (Antilles 

 + Central America pi-opei-, and adjoining parts of South 



