90 LA TOUCHE : GEOLOGY OF NORTHERN SHAN STATES. 



Thabyegon almost down to the Nam-Tu, or Myitnge as it is called 

 in this part of its course, at Lema. All round the sides of this 

 valley the Plateau Limestones rest directly upon them, the inter- 

 vening Silurian beds being absent ; on the west side the latter are 

 probably cut out by a fault. A few fossils were obtained on the 

 ridge a short distance west of Kunlein, (Loc. 89, B 5), on the path 

 from that village to Pyintha, including Echinoencrinus aff. Sencken- 

 bergi v. Meyer, already mentioned as occurring in the lower Naung- 

 kangyis of Chaungzon, (p. 75) ; Phi/lloporina sp.", Clitambonites cf. 

 squamaia Pahlen, also a lower Naungkangyi species ; and Pliomera 

 ingsangensis Reed. A patch of these rocks also occurs further west, 

 between Naungwai and Lungaung. 



The only other locality south of the railway at which these 

 beds have been observed is at the southern end of the great 

 scarp crossed by the railway between Hsum-Hsai and Nawnghkio 

 , , , at Kyauk-kyan CD 3). As one descends 



Kyauk-kyan scrap. , J i i t n 



the steep grade leading down to wetwin 

 station, on the journey from Maymyo to Hsipaw, this scarp 

 closes the view to the east, rising like a wall beyond the 

 broad valley of the Ke-laung and Hpawng-aw streams, surmounted 

 by precipitous cliffs of limestone. The scarp is due to a fault, 

 which runs along the base of it, increasing in throw from north to 

 south, and this becomes so great near the southern end, that the 

 formations underlying the Plateau Limestone are brought to the 

 surface, the upper Naungkangyi beds being exposed on the face of 

 the scarp, to a thickness of about 300 feet, on the path from 

 Hkelawng village to Enghpo, and containing the usual fossils 

 (Loc. 97, D 4). 



Along the northern edge of the plateau the upper Naungkangyis 

 are exposed continuously from Nanydk ( C 2), 

 Northern edge of near Kalagwe, in a south-easterly direction 

 to Pamon, on the Nam-panhse. Here there 

 is a gap, apparently due to a fault running along the bed of 

 the river, probably a continuation northwards of the Kyauk- 

 kyan fault mentioned in the last paragraph ; but they appear 

 again on the left bank, on the slopes below Pangsdng (D 3). 

 They are not well seen at Chaungzon, but may be found along 

 the cart road near the river between the lower Naungkangyi 

 locality (p. 74) and the bridge. Beyond this they are con- 

 cealed by overlap along the valley of the Nam-Tang to the 



