136 GEOLOGY OF THE WEST INDIES. [Kor. 



being elevated, one above another, and forming a plateau 

 or table of land^ at the summit of each^ but not rising so 

 high as in Barbadoes. Grandterre in Guadaloupe has 

 this formation, exhibiting more the appearance of undula. 

 tions, with gentle ascents and declivities, containing some 

 small streams and marshes/ which would rather encourage 

 the supposition that it rests on a volcanic basis, and is 

 therefore more liable to have its rocks deranged Irom their 

 present natural horizontal position. 



Antigua* This island not having been visited by the 

 writer, he must take its description from the specimens 

 brought from it, by which it may be concluded, that it is 

 similar, in some of its geological traits, to the island of 

 Barbadoes; having the same formation of madrepore rocks, 

 some of which are converted into silex in the form of agates, 

 &c.; which are valued, as beautiful specimens, by the curi- 

 ous* A part of the island consists of a stratified rock, in the 

 form of a green schist, crossing the island from north to 

 south, in a zone of three or four miles width, affording the 

 inhabitants a useful building stone. The southern side 

 of the island is rugged and mountainous, and is described 

 as being volcanic. 



St. Bartholomew. The formation throughout this 

 island is evidently stratified, though in great confusion, 

 (the word stratified is here used in contradistinction to 

 volcanic) the strata running in a direction a little to the 

 west of north, and dipping generally to the eastward, as far 

 as could be ascertained from the disturbed and irregular 

 position of the broken rocks. These rocks are found 

 to consist of three or four species of limestone, two of 

 them containing shells; some agregates, which are ce- 

 mented with limestone, and present much the appear- 



