374 Notices of Memoirs — Geological Congress, Mexico. 



Ou either side the Tembeling Series is flanked by a wide outcrop 

 of calcareous rocks and associated igneous rocks, named provisionally 

 the Kaub Series and the Pahang Volcanic Series respectively. One 

 of the remarkable ranges of limestone hills belonging to the K-aub 

 Series was seen from the top of Gunong Tahan and visited later by 

 the writer. It lies to the west of the range and is situated near 

 Xampong Cherual in the Ulu of the Tanum, a left tributary of the 

 Julai. From a peak in this limestone range a magnificent view of 

 the Tahan Range, about fifteen miles distant, was obtained ; and it 

 appeared to the writer that it would be easier to ascend Gunong Tahan 

 from this side than from the east. 



Petrologically the conglomerate is remarkable for containing 

 numerous pebbles of chert and carbonaceous shale with Radiolaria 

 and Foraminifera. 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 the 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 Talian 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 Seiies 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.'VV. 



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. 



II. — The Tenth Meeting of the Inteknational Geological Congress, 

 held in the City of Mexico, 1906. 



THE Compte Rendu de la Dixieme Session (du) Congres Geologique 

 International, Mexico, 1906, has now been published. It con- 

 sists of two parts, each measuring 1 1 inches by 8 inches, containing in 

 all 1,358 pages, 56 plates or maps outside the text, and 42 figures 

 in the text. The first 184 pages are devoted to the record of the 

 preparations for the meeting, the social meetings, list of members, 

 minutes of proceedings, and reports of commissions. Pages 185 to 

 1286 contain the scientific memoirs (forty-six in number) read at the 



