viii Contents. 



Chapter X 75 



Relation of the Structure of St. Croix to that of the other West Indian Islands. 

 The two great axes of the West Indies. St. Thomas, Vieques, St. John, Tortola, 

 Virgin Gorda, Anegada, Bahamas. Non- volcanic islands to the south, including 

 Barbados. 



Chapter XI 82 



The Relation of the geology of St. Croix to geology in general. In regard to 

 modes of origin of the rocks, their times of origin or relative ages, and their 

 subsequent history. JValue of fossils in determining the ages of the strata. 

 Geological systems. Age of the West Indian Volcanic Chain. 



Chapter XII 99 



Conclusion, Summary of events and successive conditions in their natural 

 sequence. 



Notes 103 



On finding the anticlinal axis of the Northwest. 



Notes 105 



On finding the anticlinal and synclinal axes of the Eastern Triangle. 



