144 



JIE. J. B. SCPvIVENOR O'S 



[June 1 91 2, 



The general strike of the limestone is parallel to the trend of the 

 main granite range. 



Unfortunately, the vertical or highly inclined bedding has given 

 rise to a belief that the limestone originally formed an anticlinal 

 arch over the transverse range of Gopeng Beds and phyllites and 

 quartzites, and is therefore younger than the latter. This view is 

 evidently adopted in a recently published report, entitled ' Etude 

 du District stannifere de Tekkah ' by M. Joseph Roux-Brahis 

 (Bordeaux : Gounouilhou, 1910) ; but, as will be seen later, it has 



rig. 2. — Fault-face of limestone forming a cliff on the eastern 

 face of Gunong Tem^urong, near Gopeng. 



been conclusively proved that this is a mistake, and that the lime- 

 stone continues under the Gopeng Beds. I referred to the subject 

 briefly in my paper on the tourmaline-corundum rocks (Q. J G. S. 

 vol. Ixvi, 1910, p. 436). It is a case of ' Barrow's Paradox.' 



(2) The Phyllites and Quartzites. 



These form the higher portion of the transverse range, which is 

 that nearest the granite, and are ver}'- well exposed on the Ulu 

 Gopeng Tin-Mining Company's land. The beds are vertical or nearly 

 so, and strike north and south. The phyllites are all somewhat 

 weathered, and in consequence show a brilliant display of colour. 

 There are numerous small quartz- veins parallel to the bedding, and 

 thin stringers trending east and west, carrying tin-ore. It is im- 

 portant to note that, so far as is known, all the tin-ore won in 

 this mine comes from the quartz-veins and stringers, and was 

 derived from the Mesozoic granite, which is also exposed in the 

 Ulu Gopeng mine. 



Xo organisms have been found in these rocks. 



