BY E. C. ANDREWS. IS") 



swinging coast south of the island backed up by lagoons and 

 lagoon-marsh meadows. 



Criteria of the adolescent stage in coast formation appear to 

 be frequent, while maturity is still far away in point of time, as 

 is shown b}'' the presence of numerous irregularly shaped islands 

 and headlands with attendant unfilled lagoons, bays and harbours. 



From a consideration of the plateau and coast features, there 

 appears to be no reason for assigning an age later than Pliocene, 

 possibly late Pliocene, for the movement of elevation which 

 carried the Tertiary and Cretaceous peneplains 3,000 feet above 

 their former positions and resulted in the formation of the canons 

 and upper valleys of the coastal area. The subsidence which 

 determined the present Barrier Reef may be referred to Pleisto- 

 cene times on topograjDhical grounds, while the latest epicycle or 

 vibration of coastal elevation may be referred to the historical 

 period. 



