630 



T. ^Y. VAUGHAX GEOLOGIC HISTORY OF CENTRAL AMERICA 



Epoch 



Events 



Upper Extensive submergence with interoeeanic connec- 

 tions. 



Middle Apparently interoeeanic connection across Central 



America. 



Lower Emergence of the Greater Antilles and Central 



America. No known interoeeanic connection. 



Eocene . 



'Upper Extensive submergence, but without interoeeanic 



connection. 



Lower Submergence in southern Mexico and Central 



America, especially in late Comanche time. 

 Probable emergence in the Greater Antilles. No 

 interoeeanic connection. 



Cretaceous ^ ^ 



Upper Submergence in western Cuba, eastern Mexico, 



and west Texas, without interoeeanic connec- 

 tion, except possibly in late Upper Jurassic time. 



Middle Submergence in southern Mexico (Oaxaca and 



Guerrero), with possible interoeeanic connec- 

 tion. 



Lower Submergence in southeastern Mexico (Puebla, 



Vera Cruz, and Hidalgo, possibly also in Guer- 

 rero), with possible interoeeanic connection. 

 Non-marine plant-bearing beds in same region 

 and also in Oaxaca. Possibly the latter may 

 be of same age as the supposed Rhsetic plant- 

 bearing beds of Honduras and Nicaragua. 



Jurassic. 



" Upper Plant-bearing l)eds in Honduras and Nicaragua, 



(Rhfetic) above mentioned, bespeak land conditions in 

 latest Triassic or earliest Jurassic. 



Upper Submergence in central Mexico (Zacatecas), with 



(Karnic) probable interoeeanic connection. 



Middle I*robable land conditions throughout Mexico and 



Central America. 



Lower I*robable land conditions throughout Mexico and 



Central America. 



Triassic . 



Late Paleozoic . 



Formation of the major tectonic axes of Central 

 America and the initial east and west axes of 

 the Greater Antilles. 



•^ Mesozoic history of Central America, Mexico, and the West Indies, by T. W. Stanton. 



