142 NOETLING : PETROLEUM IN BURMA. 



however, very probable and besides there is no reason to suppose 

 that conditions different from those of the Yenangyoung anticline 

 should prevail at the Minbu anticline. 



We may therefore sum up our knowledge of the occurrence of 

 petroleum in Upper Burma as follow : 



(i) The petroleum occurs in the miocene beds or Prome 

 stage. 



(2) It has hitherto only been found along the crest of anti- 



clinal arches. 



(3) In preference to others, petroleum is found at such places 



along the above structural lines where the strata form 

 dome-like elevations. 



(4) The occurrence of petroleum seems to be limited to a zone 



of about 40 miles in breadth which runs along the east- 

 ern side of the Arrakan Yoma. 



These facts may serve as a guide when further search for oil is 

 made. If only those localities are examined where at least one of 

 these conditions is fulfilled, much money will be saved which will 

 otherwise be wasted in fruitless search. 



From the foregoing we see that the occurrence of petroleum in 

 Burma forms no exception from the well known rule of its associa- 

 tion with anticlinal structure. It is superfluous to dwell here on 

 this subject which has been so ably discussed by Professors Hofer 

 and Orton besides many others. It is sufficient to have shewn that 

 in Burma the occurrence of petroleum conforms to those laws which 

 regulate its occurrence elsewhere. 



On the other hand it should be mentioned that the occurrence 

 of petroleum in Burma seems a particularly good illustration of its 

 restriction to dome-like elevation along the axis of antic linals, 

 a feature to which Professor Orton has already drawn attention. 1 



1 Rep. on the Geol. Sur. of Ohio 1888, Vol. VI, 1888, page 99- 



( 188 ) 



