612 



BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



TABULAR SUMMARY OP SOME OF THE IMPORTANT EVENTS IN THE GEOLOGIC HISTORY 

 OP THE WEST INDIES AND CENTRAL AMERICA — Continued. 



Time subdivisions. 



Events. 



fUpper 

 CretaceousaJ Lower 



1 



Extensive submergence; but without interoceanic connection. 



Submergence in Mexico and Central America, especially in late Comanche 

 time. Probable emergence in the Greater Antilles; no interoceanic connec- 

 tion. 



Jurassic 



Upper 

 Middle 

 Lower 



Submergence in western Cuba, eastern Mexico, and west Texas without inter- 

 oceanic conueotion, except possibly in late Upper Jurassic time. 



Submergence in southern Mexico (Oaxaca and Guerrero) with possible inter- 

 oceanic connection. 



Submergence in southeastern Mexico (Puebla, Vera Cruz, and Hidalgo, pos- 

 sibly also in Guerrero) with possible interoceanic connection. Nonmarine 

 plant-bearing beds in same region and also in Oaxaca. Possibly the latter 

 may be of same age as the supposed Rhaetie plant-bearing beds of Honduras 

 and Nicaragua. 



Triassic 



Upper 



(Rhaetie) 

 Upper 



(Karnic) 

 Middle 

 Lower 



Plant-bearing beds in Honduras and Nicaragua, above mentioned, bespeak 

 land conditions in latest Triassic or earliest Jurassic. 



Submergence in central Mexico (Zacatecas) with probable interoceanic con- 

 nection. 



Probable land conditions throughout Mexico and Central America. 



Probable land conditions throughout Mexico and Central America. 



Late Pa 









west axes of the Greater Antilles. 



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



o 



