jS GRIMES : MYINGYAN, MAGWE AND PAKOKKU DISTRICTS. 



The fifth oil sand is from 5 to 50 feet in thickness, average 20 

 feet. This is an important sand as several of the wells 

 draw their oil from it. In one well the shale below contains 

 two layers of sand, which gave signs of gas and oil, and 

 which might be included in this fifth oil sand. 



The sixth oil sand is from 10 to 93 feet in thickness, average 

 40 feet. 



The seventh oil sand varies from 60 to 107 feet in thickness, 

 average 75 feet. In four of the wells in the Yenan-C- 

 Chaung it is largely replaced by shale? and is divided into 

 two sands by this shale, which in these wells is from 39 to 55 

 feet in thickness, but it is absent in the majority of the wells. 



The eighth oil sand is 5 feet to 45 feet in thickness, average 

 20 feet. In one well it is joined to the seventh oil sand. 



The ninth oil sand is from 15 to 33 feet in thickness, average 

 23 feet. This is a most important sand as several of the 

 wells draw their oil from it. In one well it is divided into 

 two by a bed of shale 5 feet thick. 



The tenth oil sand is mostly only a few (2 to 7) feet in thick- 

 ness, but in one well the next shale is missing, and so it is 

 joined to the eleventh oil sand, when the recorded thickness 

 is 60 feet. 



The eleventh oil sand is only reached in three wells, and in 

 one of these it is largely replaced by slate. Its average 

 thickness is 20 feet. 



The twelfth oil sand is only reached in one well, and it is 

 there 13 feet thick. 

 Where sandstone beds, which show any signs of petroleum, are 

 exposed, the rock is found to be much hotter than the air and the 

 surrounding strata. 



The upper miocene beds (Yenangyaung stage) consist of inter- 

 stratified sandstones and shales, the latter being 



Yenangyaung itage. ° 



predominant. Along the Smgu-Yenangvat 



( 38 ) 



