SILURIAN SYSTEM : ZEBINGYI STAGE. 



169 



s 



S 



Z! ^ 2 



Fossils. 



e4 



o 



chgans is seen about 100 yards to the north of the station, in a 



low cutting and in a ' borrow pit ' east 

 of the line, and is overlaid by the 

 Plateau Limestone ; then comes a deep 

 cutting, in which the underlying Nyaung- 

 baw beds, brought up by a fault, are 

 exposed, dipping to N. 30° E. at 52 

 degrees. At the northern end of this 

 cutting the Zebingyi beds appear again, 

 dipping in the same direction, and resting 

 upon the denuded edge of the under- 

 lying beds (Loc. 42, B 5, Plate 9). The 

 shales at the base of the Zebingyi beds 

 are ferruginous and do not contain many 

 fossils, but a few 

 specimens of T. elegans 

 were found in them. The black shales 

 follow, intercalated with red earthy shales, 

 exposed in a large ' borrow pit ' at the 

 side of the line, both containing the 

 usual profusion of Tentaculites and large 

 graptolites. A species of Monograptus, 

 reaching a length of four or five inches, 

 is very common here, but is not well 

 enough preserved for identification. 

 Two species of Modiolopsis were also 

 found, one of which, M. shanensis 

 Reed, is well preserved and is compared 

 by Mr. Cowper Reed to M. sim/plicissima 

 Barr., from Et. E 2 of Bohemia. The 

 other species is the same as that found 

 at Zebingyi, but the only specimen 

 collected is not in so good a state of 

 preservation. 



From Waboye the Zebingyi band 

 runs along the crest of 

 t he scarp bordering t lie 

 Sedaw valley, and is 

 visible in the beds of the streams that 

 cross the railway between Thondaung and 



60 &< 



a 



d 

 o 



CO 



a" 



JH 



T) 3 



m - 



~ I 



so o 



2 t 



<D - 



N 1 



.. CO 



CO <4-l 



T) O 



9 ~ 



eq £ 



. 60 



5 c 



a) a. 

 60 



a 

 3 



cS 



Thoiulaiin^ li 



Naungkfl as vi 



