4 OLDHAM : GEOLOGT OF MANIPUR AND NAGA HILLS. 



ash exposed, which has a dip to the south-west. Westwards from 



Chamu Kulel to Chingsao the rocks are for the most part grey slate with 



a westerly dip, a band of white slate with the joint-planes stained red, 



being exposed below Chamu, while on the opposite side of the valley 



some fragments of steatitic schist were found. From here to Khangoi, 



except where interrupted by the trap or newer overlying rocks, slates and 



quartzites of this same c older series ' continue. 



8. Below Khangoi village I found for the first time some beds which 



General description were distinguishable from the great mass of grey 

 continued. . 



Limestone near Kongui. slates and sandstones with which they are inter - 



bedded. These were a series of red and green slates, perhaps 200 feet in 

 thickness, in which there was a solitary band of calcareous nodules, 

 succeeded by grey and arenaceous slaty shales. Between Khangoi and 

 Kampui (Lambui of map) , about a mile beyond the former, there is another 

 exposure of limestone which is well seen on the spur above Khangoi 

 thanna; there is a thickness of about 150 feet, in all of a fine grained 

 brittle limestone breaking with an imperfect conchoidal fracture, the 

 lower portion is pinkish, while the upper and thicker portion is a pure 

 pale-grey weathering somewhat yellowish ; where seen in situ the beds 

 were vertical with a north-north-west and south-south-east strike, though 

 in the cliff above the grey limestone seemed horizontal probably from 

 some freak of weathering; this, however, is a purely local variation 

 of strike. The limestone is followed by slates and sandstones, but on the 

 Hungdung spur, it crops out again with a north-north-east and south- 

 south-west strike, or even nearer north, the exact bearing could not be 

 distinguished. In the bed of the Nung-shang-khong the slates and quart- 

 zites had a north by east and south by west strike. Beyond Kampui 

 red and green slaty shales once more cropped out with a single band of 

 limestone nodules, and beyond this to Susukameng the rocks were of the 

 usual grey slate and quartzite type. 



9. We have here evidently the only indication I have been able to 

 Synclinal or anticli- ^ n ^ °^ ^ ne structure of the country, for this repeti- 

 naL tion could only be due to either a synclinal or an 



( 220 ) 



