HISTORICAL SUMMARY. 



359 



The next dislocation is the folded zone of Nyaungbaw lime- 

 stones to the east of Zebingvi, which forms the 



Pyintha flexure. „ , , , , . , . _,. 



final step up to the mam plateau. The 



rocks on the outer (western) flank of this fold form a steep dip- 

 slope facing west, but further in they become vertical, as may be 

 seen where they have been eroded in the ravines below Thon- 

 daung ; and there is probably a fault along the crest of the ascent, 

 though the eastern limb of the fold cannot be seen, as it is con- 

 cealed by the overlap of the Plateau Limestone. 



This system of faults appears to bear a close resemblance, in 



its relations to the gulf of Pegu, with which 

 Dinaric type of faults. . . . , T nl „ 



1 include the whole of the lrrawaddy valley 

 south of Bhamo, and probably the Bay of Bengal also (for the separ- 

 ation of the latter from the gulf of Pegu by the Arakan Yoma 

 was effected by a very recent upheaval), to the Dinaric system, 

 or fractures of the Karst, bordering the eastern shores of the 

 Adriatic. 1 Prof. Suess indeed himself calls attention 2 to the simi- 

 larity between the gulf of Pegu and the eastern basin of the Medi- 

 terannean bordering the coast of Asia Minor, but the resemblance 

 to the Adriatic seems to me to be still more striking. 



Beyond this rise no evidence of definite lines of folding can be 

 t made out, — though the rocks are seldom 

 horizontal,— for the Plateau Limestone conceals 

 everything below it, except at the edges of the plateau, where 

 only a narrow fringe of the older rocks can be seen. It is when 

 we turn the corner of the ancient land area lying to the north, and 

 examine its eastern aspect, that we find further and striking evid- 

 ence of the magnitude of the thrust, and of the modification of 

 its effects produced by the presence of this unyielding mass of rock, 

 or ' hoist.' 1 have already described in detail the great over- 

 thrust fault that runs parallel to the Nam-Tu from Panghsa-pye 

 to the north (p. 136), and I need only call attention to the fact 

 that this dislocation dies away immediately opposite to the point 

 where the boundary of the Chaung-Magyi series, that is to say the 

 contour of the old land surface, bends suddenly from a general north- 

 south direction to the west. 



1 Das Autlitz dei Eid*, Vol. J, p. 344. 

 * Ibid, p. 77 i. 



