Classification of 

 ranges. 



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20 GRIESBACH : GEOLOGY OF THE CENTRAL HIMALAYAS. 



although cut into masses by rivers which rise in the valleys north 

 the line of snowy peaks. 



Fig. i shows the section across 

 the Tibetan pla- 

 teau, and its 

 fringing belts of mountains. 

 The southern rim of this plateau 

 is formed by the Himalayas, 

 and as the two ranges of the 

 water-parting and the line of 

 highest elevations are undeni- 

 ably the most important features 

 of the girdle of mountains, and in 

 a sense are closely connected by 

 common characteristics, I think 

 the term "Central Himalayas" 

 may be retained for them — a term 

 already in use in the Geological 

 Survey of India. The authors of 

 the " Manual of the Geology of 

 India " have proposed the follow- 

 ing geographical divisions of the 

 Himalayas :— 



i. Sub-Himalayas (Siwaliks, 

 etc.) . 



2. Lower or Outer Hima- 



layas. 



3. Central Himalayas, 



north of which are situ- 

 ated the— 



4. Tibetan ranges. 



5. Kuenlun. 

 The term "Outer" Himalayas 



has already been used to define 



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