594 



E. C. ABEND ANON 



JVW. 



SB. 



layers in the same formation, whichi eventually dip 65° NW near 

 Sui-che-t'an. The Yang-tzi is bent round to the SSE and cuts almost 

 vertically the next anticline, the upper strata of the northern limb of 

 which are, as just mentioned, strongly compressed. The NW dip 

 of the layers at first increases to 80° and then diminishes to 25°. 



And then the 

 anticlinal arch 

 in both of the 

 limestone walls 

 becomes beauti- 

 fully visible. 

 This very fine 

 section, in the 

 middle of which 

 the two limbs of 

 the anticline, 



both dipping 25°-3o°, are most clearly exposed, stretches over almost 

 the whole length of the SSE-directed course, in which the narrow 

 Yang-tzi flows below Wen-che-chi. In the last part of the SE limb 

 the layers dip 70° south. 

 Near Ts'ing-shi-tung 

 the Yang-tzi turns 

 sharply to the east, and 

 flows through the east- 

 ern continuation of a 

 valley, formed by a 

 wedge-shaped syncline 

 (like that reproduced 



Fig. 





Fig. 3 



in Fig. 3). Inside the 



valley looking west, we could see a series of south-dipping layers 

 of the reddish-brown formation, but soon below Ts'ing-shi-tung the 

 river banks are formed of 50° to 55° north-dipping layers of gorges- 

 hmestone, which shows that the river, emerging from the wedge- 

 formed connection of the two anticlinal hmbs, has pierced into the 

 northern limb of a southern anticline, which, in this part, trends 

 nearly EW. From Ts'ing-shi-tung to Fu-li-chi, the Yang-tzi remains 

 in the upper part of the gorges-limestone formation, which auses 



