388 



AGE OF FORMATION. 



superincumbent layer of coral-limestone has been 

 eaten through or denuded. As to the age of this 

 coral-limestone, it is certainly of the newest tertiary 

 period, even if it does not belong, by its fossils, to 

 the recent era.* 



* Since my return to England I have seen the large Dutch 

 work, containing part of tbe report of the scientific commission 

 sent to examine their East Indian dominions some years ago. 

 In this is a geological map of the south-west end of Timor, in 

 which the rocks around Coupaug are called M Jura Kalk." If 

 this term is applied lithologieally to the tertiary rocks, it is to a 

 certain extent applicable, as they have often a concretionary and 

 oolitic structure, just as the stone in the limestone of Raine's 

 Islet has. If, however, " Jura Kalk" is meant to have a chro- 

 nological meaning, it is either incorrectly applied, or the forma- 

 tion is incorrectly extended in the map to the neighbourhood of 

 Coupang. 



