REPORT ON THE GEOLOGY AND PHYSICAL GEO 

 GRAPH Y OF "THE STATE OF PERAK. 



By the Rev. J. E. Tenison-Woods, F.G.S., F.L.S., &c. 



Geology. 



The Geology of the State of Perak may be briefly described as 

 consisting of : — 



1. An immense granite formation passing into schists and slates 

 of very early or ancient geological age. 



2. Of a formation of paleozoic slates and clays, forming outliers 

 or detached portions showing that it has been subject to great 

 denudation. It is nearly always decomposed into blue mottled 

 clays, red sandy clays, or highly variegated contorted clays com- 

 monly called Laterite. It forms small hills, or lies along the base 

 of the ranges or in the valleys and on plains. It is not now of 

 great thickness but has evidently once covered the whole granite 

 formation. 



3. Limestone in detached outliers or isolated hills of precipitous 

 character showing much denudation. It is stratified or crystalline. 

 There are no traces of fossils, or at least none have been yet found. 

 I think, however, that it is probably of paleozoic age. From its 

 wide extension throughout Perak where it crops out in so many 

 places, I should say that it once covered the whole of the granite 

 and paleozoic clays. 



4. Drifts and alluvium derived from ancient streams and river- 

 beds, formed of material from all the preceding deposits. 



