562 /. B. SCRIVENOR 



in low country to the west of it. In the headwaters of the Patani 

 River the granite hills continue and end west of the Patani River 

 near the sea. 



Near Taiping are two interesting outcrops of limestone. On 

 the west of the Bintang Coulisse is a limestone hill, Batu Kurau, 

 nearly surrounded by granite. On the east of the coulisse is a 

 better-known limestone hill, Gunong Pondok, visible from the 

 railway, which may be entirely surrounded by granite: a covering 

 of alluvium on one side makes this doubtful. 



The largest granite range of the Peninsula is that generally 

 known as the Main range (No. 9, the Kerbau Coulisse; Gunong 

 Kerbau 7,160 ft.), and between it and the Bintang Coulisse is a 

 small granite range (No. 8, the Kledang Coulisse) which dips under 

 altered sedimentary rocks at either end. At the northern end of 

 this range are two peaks, Gunong Soh (4,336 ft.) and Gunong Besar 

 (5,725 ft.), but this granite dips under schists and sheared quartz- 

 porphyry of the Pahang Volcanic Series immediately north of the 

 east-and-west reach of the Perak River (see map). Gunong Soh 

 and Gunong Besar are the highest peaks in this granite mass and 

 are connected by low-lying granite areas with the Bintang Coulisse 

 on one side, and the Kerbau Coulisse on the other. Farther south 

 there is a break in the granite hills where a tributary of the Perak 

 River cuts through the range north of Kuala Kangsar. Here the 

 granite almost entirely vanishes below the surface : a strip of older 

 sedimentary rocks and one of the small patches of Tertiary rocks 

 (containing limestone) break the continuity of the granite except 

 for a small exposure in the Perak River. Both in this range and in 

 the Bintang Coulisse there is evidently a dip in the profile of the 

 granite ridge. In the Bintang Coulisse it involves a drop on the 

 steeper side of about 5,000 feet in 8 miles, an incline of roughly 

 I in 8; in the Kledang Coulisse there is a drop on the steeper side 

 of about 2,000 feet in 2 miles, an incline of roughly i in 5. 



Farther to the south the granite of the Kledang Range, forming 

 peaks of between 2,000 and 3,000 feet, dips under quartzite, which 

 forms a lower continuation of the range until it dies away in the 

 alluvium of the Perak River. 



In the country between the north part of this Kledang Coulisse 

 and the Bintang Coulisse, an area that is low-lying, there is, as 



