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GEOLOGICAL RESEARCHES IN 



A. Deposition and metamorphism of the older meta- 



morpiiic strata of China. 



B. Deposition of the metamorpic strata of Mongolia. 



C. Deposition of the great Devonian limestone for- 



mation. 



D. Eruption of the older porphyries of the Sishan, 



west of Peking. 



E. Deposition of the Chinese Coal measures. 



F. Eruption of the younger porphyries of the Si- 



Disturbances. 

 Uplifts apparently of various ages and 

 directions, of which the surface effects 

 are mostly obliterated. 



Sinian revolution forming the N. E. S.W. 



system of uplifts. 

 Emergence of all China Proper. 



Submergence of Mongolia. 



W. Eruption of the trachytic porphyries of Kalgan 



and the Gobi Desert. 

 X. Eruption of the volcanic rocks of S. Mongolia 



and the Baikal region. 

 Y. Deposition of the steppe deposits of the Gobi 



Desert. 



Z. Deposition of the lake loam of the northern lakes. 

 Beginning of the delta of the Hwang Ho. 



Commencement of the emergence of the 

 plateau. Formation of the great dislo- 

 cation along the southern edge of the 

 plateau. 



Supposed change in the course of the 

 Hwang Ho, and formation of the chain 

 of northern lakes. 



Deepening of the channel of the Hwang 

 Ho between Shansi and Shensi, and of 

 the gorge of the Yang Ho, and conse- 

 quent drainage of the northern lakes. 



