YENANGYOUNG. 



73 



I 



petroliferous and argillaceous beds has been recorded in descending 

 order — 



. Yenangyoung stage. 



(o\ 



(2) 



(3) 

 (4)) 



(j> 



(6) 



104 1 



;eet oi 



sand • 



49 



» 



shale and clay 



48 



11 



water sand . 



95 



1* 



clay 



87 



>• 



oil sand • 



28 



«» 



water sand. 



64 



>i 



shale and clay 



3 



i) 



water sand . 



42 



»» 



shale and clay 



121 



11 



water sand . 



14 



11 



shale and clay 



5 



i) 



water sand • 



70 



»i 



clay 



15 



11 



water sand. 



35 



11 



shale and clay 



13 



»> 



oil sand 



3 



>i 



shale 



Prome stage. 



II 



The above record proves the existence of at least five successive 

 and independent arenaceous beds, varying in thickness from 3 to 121 

 feet, which are saturated with water. The second bed forms prob- 

 ably part only of the bed containing petroleum at the top. Between 

 these water bearing strata two petroliferous beds have been found, 

 the first of which is overlaid by only one stratum containing 

 water, while all the rest are above the second oil sand. We notice, 



however, that in every instance impermeable argillaceous beds 



p 



separate the water bearing and petroliferous strata, and that it is' re- 

 markable how a comparatively thin bed of clay forms an effectual 



separation. 



The record of well No. 54 is equally interesting, although it 

 represents an anomaly which has already been mentioned. The 

 following is the sequence in descending order : — 



80 feet surface sand, 

 blue clay. 



black sand . . • . . * • (0 



grey water sand •..••• (2) 

 blue clay. 



dark sand with slight show of oil, and water I, 

 blue clay. 



( »9 ) 



20 



5) 



60 



» 



is 



1) 



100 



1) 



1 25 



J» 



25 



51 



\ 



