192 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVII. 



THE GEOLOGY OF WORLI HILL. 



Mr. Ribeiro read a very interesting paper on the above subject and 

 illustrated it with several very fine examples of various minerals and fos- 

 sils collected by him at Worli. 



He said Worli Hill at no distant date formed by itself one of the seven 

 isles which go to make up our present (^ity of Bombay. It is a very interest- 

 ing spot geologically, in fact the most interesting in Bombay. The Hill 

 is made up of two lava flows, between which is sandwiched a 30-feet 

 thick bed of sedimentary deposits. The lava beds are similar to the trap 

 rock in the other parts of the island, but the aqueous strata contain a 

 large amount of interesting relics from which important facts can be 

 deduced. 



An examination of the beds of trap above and below the sedimentary 

 rock shows that the latter is older than both the trap flows, and the 

 occurrence of a very large amount of frog fossils goes to prove that the 

 aqueous deposits took place under fresh water, probably in a lake or a 

 river. 



Mr. Ribeiro said that he had secured a fine collection of rock, mineral 

 and fossil specimens from the Hill, but it was very much to be regretted 

 that owing to the non-existence in a City like Bombay of a standard collec- 

 tion of minerals and geological specimens, it is not possible to give the 

 specific names of theai beyond saving that they consist of Oalcite quartz 

 and Zeolites. 



The full text of Mr, Ribeiro's paper will be published in the Society's 

 Journal. 





