68 OOGGD? VAiuW N : MINKS & MINERAL RESOURCES OF YUNNAN. 



ferous volcanic rocks are passed and the then dark indurated shales, 

 followed by coarse gritty sandstones. These strike north-east to south- 

 west and dip south-east at 42°. Unfortunately a thick soil-cap 

 hides the rocks near the mines, but the horizon is probably the same 

 as the Yunnan Hsien one, from which it is separated by a distance 

 of about 14 miles as the crow flies. An assay of the weathered 

 coal from this locality gave the following result :— 



Locality. 



Tong-ch'uan 



Moisture. 



Volatile 



matter. 



Fixed 

 carbon, 



Ash. 



72-06 



17-10 Sinters slightly. 



Coal-seams arc also found on the western side of the Pin-ch'uan 



-. . ., Chou valley. From the small walled city of 



Coal -scams to the J J 



west of Pin-ch'uan that name a road leads m a north-westerly 

 Chou - direction to Kan-tien at the edge of the plain. 



At this place coarse sandstones and shales strike north 30° west 

 and dip in a north-easterly direction at 55°. Two miles further 

 west there are exposures of grey sandstones separated by layers 

 of grey micaceous shale. Coal is mined about two miles to the 

 south-west of Kan-tien, which lies at the foot of a spur running 

 out from a well-marked ridge. Very few rocks are visible near 

 the workings, but the type of strata found further away is litho- 

 logically identical with the coal-bearing horizon of Tong-ch'uan 

 and Yunnan Hsien. 



An assay of a sample from a heap lying near the mouth of an 

 old working gave the following results : — 



Locality. 



Kan-tien 



Moisture. 



2-01 



Volatile 

 matter. 



8-55 



Fixed 

 carbon. 



71-14 



Ash. 



1803 



Sinters slightly. 



j 



Mesozoic Coal of the Yangtze Valley. 



Yunnan Ilsien is in the valley of the Red River, but very close 

 to the divide between it and the Yangtze. The northern exten- 

 sion of the Yunnan Hsien field is situated within the drainage 

 system of the Yangtze. On the northern bank of the river coal is 

 extensively worked about Chiu-ya-p'ing Hsien (lat. 3 26° 38' : long. 



