JOURNAL 



OF THE 



ASIATIC SOCIETY. 



JUNE, 184/. 



On the Local and Relative Geology of Singapore, including Notices of 

 Sumatra, the Malay Peninsula, fyc. — by J. R. Logan, Esq. 



[The following paper was sent to the Asiatic Society of Bengal in 

 January 1846. The delay which has taken place in its publication in 

 their Journal, enables the writer to append an extract from a letter to 

 Professor Ansted, in which he has given a summary of the results of 

 his subsequent observations made in localities more favorable for geolo- 

 gical inquiries than those to which his attention had been confined 

 when the paper was written. It may save the reader some trouble if 

 he be furnished at once with the key to the theoretical discrepancies 

 which may be noticed between the paper and the letter. He thinks it 

 better to do this, and to leave the former as it stands with all its faults, 

 rather than to alter it in conformity with his more matured, but still 

 imperfect, views. The geology of every fresh region has to be worked 

 out amidst doubts and errors, and a record of the stages through which 

 its theory, if at all new, passes in its progress towards complete truth, 

 may often serve ultimately as its best demonstration, because it will 

 show that it was not hastily adopted, but gradually grew out of a long 

 continued and defeated effort to assign to every new phenomenon a 

 place in familiar systems. 



The principal result at which the writer had arrived when the paper 

 was written was the opinion, advanced hypothetically in it, that the 

 southern extremity of the Peninsula, &c, had been ruptured and up- 

 raised by subterraneous forces, and that through the rocks so affected 



No. VI. New Series. 3 y 



