104 NOETLING : PETROLEUM IN BURMA. 



220 feet above sea level, and on the top of the clayey beds rests a 

 bed of 50 feet of " blue sand " which must be separated from the 

 overlying beds of the Yenangyoung stage. The petroliferous sand 

 to the extent of 79 feet thickness was found at 274 feet from its 

 surface, and is found 200 feet above sea level. 



In No. 2t, we observe a further change, the sandy bed imme- 

 diately below the Yenangyoung stage, 80 feet thick, contains a small 

 quantity of oil and unquestionably represents the top sand of No. 47 

 and overlays an argillaceous bed of 130 feet thickness which exhibits 

 the same feature towards its base as seen in No. 47, that is to say, 

 it becomes sandy, thus probably representing a series of alternating 

 argillaceous and arenaceous beds. The petroliferous sand to the 

 extent of 42 feet rests on petroliferous sand and was met at the 

 depth of 290 feet from the surface and its top was 180 feet above 

 sea level. 



The top of the petroliferous sand was therefore found in— 



No. 11. No. 47. No. 21. 



at 170 200 180 feet above 



sea-level. 



These figures prove that there must exist a rise of its top from 

 No. 11 towards No. 47 and a fall from No. 47 towards No. 21. 



(b) Section XIX, pi. XIII, wells 64(3), 20, 47, 10. 



The series begins in No. 64(a), below the Yenangyoung stage with 

 a bed of " blue " sand of 30 feet thickness, followed by an argillaceous 

 bed below which 45 feel of " water sand " were found followed by 100 

 feet of clay. The petroliferous sand was struck at 280 feet from the 

 surface or 180 feet above sea level, it is very poor in quality and 

 rests on water sand. 



In No. 20 the section is not as complete as it might be. Below 

 62 feet of beds belonging to the Yenangyoung series, 86 feet of "fine 

 solt grey sand with beds of shale " were found ; it is not impossible 

 that the series was sand at the top and clay at the bottom imme- 

 diately above the thin layer of water sand. The petroliferous sand 

 ( 150 ) 



