1918.| The Geotectonics of the Tertiary Irrawaddy Basin. Alt 
(2) The strata along the eastern boundary, where the miss- 
ing beds are conspicuous by their absence 
vertical or nearly so. A normal fault _would nob 
ufficient to account es their absenc 
(3) gee observed “ debris of the vaibebein fi in nthe basal 
of the pliocene.”’ 
In a paper eat 2 ‘The Northern Part of the Yenan 
Oilfield,” I proved to my own satisfaction at least that the 
Ye enangyat anticline was structatally a fold-faul ed area, in 
suming then that inate is a fold-fault with a shade to the 
west, Grimes’ objection numbered (2) above, is no longer 
applicable. Such a fau It also accounts for the missing beds. 
I st 
Was really a ‘“ mixed accumulation of Irrawaddy rock and 
broken "Pogu st nem = with selenite of 5 dara secondary 
origin.” The boundary in fact appeared t to be, in the 
“ee sag of the field near Sabe at least, tie) nooiaeltag a fault- 
My view of the structure was not accepted by E. H. Pascoe, 
but he had not an opportunity of visiting those opens 
sections which I had described, and the question being a 
eae of hee fact, nothing but a visit to the field could 
ave settle 
He. Be rto confirmed my view of the structure of the 
Yenangyat anticline, when he “surveyed it in 1911. He has 
alluded to this in a paper published in 1915.° 
; he Minbu anticline is closely similar to that of Yenangyat 
> Rg 85 the fact that on its eastern flank certain of the 
- Of beds 
(F errugin nous Conglomerate). In a section across Blocks 9 and 
” (Section FR, of Pl. 39, an cit.) he marks a fossil bed, distin- 
; the Red Earth bed 
ber in one section in Block 60 seeing t. 
w : : : lying beneath it. . 
Th al normally lie above the White Sand bed, she mixed debris 
ed on either side along the strike by ‘ 
Pak ely mines above, in which the Red Bed and White Sand were com 
Plete 
Ind. , 
Vol, *Grolony ot of gee Country near Ngahlaingdwin. Ree. Geol. Sur. 
