BIRDS OF CUBA 



13 



Time 

 Paleozoic? 



Jurassic 

 Cretaceous 



Eocene 



Oligocene 

 (a) Lower 



{b) Upper 



Rocks 



Serpentine and 

 granite 



/ Limestone with 

 )^ fossil ammonites 



Hard, grayish lime- 

 stone, underlain 

 by arkose 



Limestone, glau- 

 conitic sands, etc. 



Miocene 



Pliocene? 



Pleistocene 



Events 

 Intrusion of igneous rocks into 

 sediments now mostly eroded 

 [ away. 



High uplift and erosion. Land 

 possibly connected Florida and 

 northeastern South America. 



Subsidence, probably of the 

 whole Island, but not all at 

 once. Some volcanoes may 

 have been active. 



Subsidence. Active volcanoes, 

 causing interbedding of vol- 

 canic and sedimentary rock. 

 Probably intrusions also. 



I 



f Deep subsidence of at least por- 

 Radiolarian earths ^^ ^^^^^ q£ ^|^g Island. 



Limestones, calca- 

 reous marls, some 

 conglomerate 



Absent 



White limestone 



Elevated coral reefs 

 containing recent 

 species 



Submergence of the whole Island 

 excepting occasional peaks 

 and lines of hills along the 

 northern and southern por- 

 tions of Santiago Province. 



Elevation, terracing and folding. 

 Probably some volcanic activ- 

 ity and connection with \ uca- 

 [ tan and Haiti but not Jamaica. 



Doubtfully a subsidence of about 

 200 feet. 



Subsidence of 80 to 100 feet, then 

 about equal elevation; sub- 

 sequent subsidence of 40 to 70 

 feet. There may have been 

 minor oscillations. 



