74 



TAHAN EXPEDITION. 



Pathologically the conglomerate is remarkable for containing 

 numerous pebbles of chert and carbonaceous shale with radiolaria and 

 foramenifera. It is believed that these pebbles were derived from beds 

 of similar chert and carbonaceous shale in the west of Pahang. The 

 majority of the pebbles in the conglomerate are sandstone and quartz. 

 The matrix is quartzose. 



The sandstone afforded andalusite on separating tho grains by 

 means of heavy liquids, and also a few grains of zircon and other 

 minerals. 



In the Tahan River greenish schistose grits were found to contain 

 a little tourmaline. 



The shale is generally red, owing to surface weathering. 



On the gravel banks of the Tahan River there are found pebbles of 

 quartz-porphyry and of a basic rock, which is of the same composition 

 as dolerite. No outcrops of either rock in situ were found here ; but 

 elsewhere data have been collected which make it probable that this 

 rock is younger, not only than the Tembeling Series, but also than the 

 granite of the Federated Malay States. 



In the Rivers Tekai, Tembeling and Tahan there is abundant 

 evidence of the Tembeling Series having been thrown into a series of 

 anticlines and synclines. In the part of the Tahan Range visited the 

 predominant dip is about 45° W.S.W. 



Malays can still be found who hint vaguely and mysteriously at 

 mineral wealth in the Tahan Range. That small quantities of gold 

 occur is extremely probable, and the presence of tourmaline makes it 

 necessary to admit the possibility of tin ore being found also. To the 

 prospector, however, the indications are most unattractive. The range 

 would make an ideal health station. 



§9th January, 1907. 



J. B. SCRIVENOR, 



Geologist, F.M.S. 



