70 GRIMES: MYINGYAN, MAGWE AND PAKOKKU DISTRICTS, 



The econtry covered by wbich [t is im P os sible to estimate, but which must 



recent alluvium. j n p] aces De very considerable as deep stream 



beds have not reached the base of it. The beds consist of 



The alluvial beds at SandS ' cIa y e y SandS a " d § ravels and var y Some " 



Oubintwingwa. w h at yi^ t h e locality. At Oubintwingwa they 



are white clayey sands with subordinate clay bands and 



containing numerous but small nodules of kankar, which 



are rarely more than £ inch in diameter ; farther east 



towards Gwegyo they are gravelly and contain 



Near Gwegyo. . _ ' . . . , 



numerous small rounded pebbles of quartz and 



fossil wood, which shows that they were derived from the 



pliocene beds, and at Pagan these beds of gravel, which cap 



the low hills, are ferruginous and cannot be distinguished 



in character from the plateau gravel on the tops of the 



Singu and Tangyi hills ; in the cliffs of the Irrawaddi too 



between Yenangyaung and Kyaukye and in 



Between Yenangyaung th r p i aces one finds interstratified with 



and Kyaukye. * 



ordinary alluvial beds, which Dr. Noetling has 

 called the lower silt, 1 beds of gravel with pebbles and 

 pieces of fossil wood like those in the beds of plateau 

 gravel on the hills above, the only differences between the 

 gravels being the quantity of iron in the matrix between 

 the pebbles, the lower beds being as a rule less ferruginous 

 than the beds on the hills. 

 Around the Gwegyo hills and between them and Kyaukpadaung 



there are in the sandstones and gravels numer- 

 Ironstone nodules as a ous spherical nodules of ironstone, which when 



scuce of iron. " 



broken are seen to be concretions round a 

 nodule of clay or some other centre ; formerly these nodules were 

 smelted for iron by the Burmans in rude furnaces, and remains of 

 these furnaces and slag heaps may still be seen in several places, 

 e.g., at Nyaunigym, Kyauktan, etc. 



The nature of the beds is, I think, undoubtedly alluvial, they are 

 post-pliocene in age resting in places on the upturned edges of 



I Memoir, G. S,, I., Vol. XXVII, Pt. 2, p. 

 ( 70 ) 



