YENANGYAT. 133 



The strike of the strata is nearly due north and south, but it seems 

 almost certain, that it changes along the axis of the anticlinal which, 

 instead of running straight, apparently presents an undulating line. 

 Unfortunately I had no time to study this subject in greater detail. 

 It seems to me that the dip of the strata also varies, a matter which 

 might be expected, and it further seems that this results in the forma- 

 tion of a dome like structure as at Yenangyoung, but time did not 

 allow following up this matter. It is to be hoped that the deep 

 borings which are soon to be carried out north of the Yanaung- 

 choung ravine will shed light on this question. 



B. — The sections of the drilled wells. 



The number of drilled wells in the Yenangyat oilfield, is very 

 small ; when I left the locality at the beginning of 1895 there were 

 only six, while a seventh was just going to be constructed. Out of 

 these six, one, No. 4, did not afford any information on the stratigra- 

 phical features of the Yenangyat oilfield, because it was drilled on the 

 eastern side of the anticline at a place where the western dip was 

 almost 90 ; the result might have been anticipated. Except a thin 

 bed of clay, the drill recorded nothing but sandstone, most probably 

 the same bed which it never left for the whole depth of the well. It 

 is remarkable that the water found in this well was under high 

 pressure, indicating therefore a head of water, which must be found 

 at a considerable distance towards east, as the low and narrow 

 Taungsin ridge, can hardly be supposed to yield the quantity. 



The five other wells were drilled in an almost straight line run- 

 ning east and west, that is to say, they were placed on a line which 

 would afford a very good cross section through the deeper strata, and 

 from this point of view the records of these few wells are exceedingly 

 valuable. 



From the records it seems that the series affords the same mono- 

 tonous sequence as recorded from the Yenangyoung oilfield. The 

 correlation of the strata was however much easier, because, to 

 judge from the great regularity of the superficially exposed strata, 

 a similar constancy m\ght be expected in greater depth. 



(179 ) 



