YENANGYOUNG. 



petroliferous and argillaceous beds lias been recorded in descending 

 order — 



104 feet of sand • 



49 „ shale and clay 

 water sand . 

 clay 



oil sand • 

 water sand, 

 shale and clay 

 water sand . 

 shale and clay 

 water sand . 

 shale and clay 

 water sand . 

 c'.ay 



water sand, 

 shale and clay 

 oil sand 

 shale 



48 



95 



87 



23 



64 



3 



42 



121 



14 



5 

 70 



15 



35 



13 



3 



Yenangyoung stage. 



i 



(2) 

 (3) 

 (4) / 

 (5) 

 (6) 



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 

 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. 



20 ,, blue clay. 



60 „ black sand . . . . . . (1) 



X S v grey water sand . ..... (2) 



ioo ,, blue clay. 



125 „ dark sand with slight show of oil, and water I. 



25 „ blue clay. 



( 119 ) 



