66 GRIMES: MYINGYAN, MAGWE AND PAKOKKU DISTRICTS, 



wash ; when these, especially the latter, are in juxtaposition to the 

 lower silt it is impossible to distinguish between them. 



To the relative age of the plateau gravel and the lower silt 



Relative age of the l ^ better Fefer here - The P lateaU S raVel 



pkteau -ravel and the WaS de P osited on the tops of the hills before 

 denudation had moulded the country into its 

 present form and when the tops of the hills were a flat plateau, 

 and it has suffered from the same denudation which has carved out 

 the present valleys and stream beds, but the lower silt has been 

 deposited at a lower level in the valleys, carved out by this denuda- 

 tion, and so I think the plateau gravel is certainly of greater age 

 The recent and post- than the lower silt - The post-pliocene and 



YenanTyaun^^ivisTbb re <* nt de P 0sitS *» the neighbourhood ' of 



into three groups. Yenangyaung may, I think, be divided into 



three divisions : — 



i. The plateau gravel representing the former river beds of 

 either the Irrawaddi basin or a predecessor of it. 



2. The lower silt being part of an older alluvium of the 



Irrawaddi. 



3. The rain-wash and stream sands being a newer alluvium. 



II. The Pagan anticline, — Five miles south-east of Pagan and 



Nyoungu we come to a range of hills rising: 



The Pagan range of J & & & 



hills. for their whole length quite suddenly out of 



The position, extent and the surrounding country, which are generally 



known as the Pagan hills and which run in 



a direction 25 VV of N, E of S for a distance of 14 miles to 



the south-east. These hills are composed 



Beds of upper miocene. ,. , r ,^ 7 \ , j 



entirely 01 upper miocene (Yenangyaung) beds 



of which neither the top or bottom beds are exposed, and which are 



T , .... , ( ,. bent into an anticlinal fold. In this anticline 



1 he anticlinal told un- 



symmetrical. t i ie fo^ j s unsymmetrical, being much steeper 



on the east side than on the west, but owing to the anticline being 



faulted close to its crest, or else to very exten- 

 Fault. . . . . . , 



sive denudation, only in two or three places is a 



small thickness of the beds on the east side exposed, and every- 



( 66 ) 



