OLDHAM : GEOLOGY OP MANIPUR AND NAGA HILLS. 3 



a south -easterly dip to the bed of the Laimatak. On the ascent from the 

 Laimatak there is a series of grey slates too decomposed for the dip 

 to be distinguishable, but towards the crest sandstones come in at an E. 

 N. E. dip, which continues as far as the alluvium of the valley of 

 Manipur. 



6. To the east of the valley, I found a great series of slates and 

 General description quartzites with an easterly dip, generally with 



some north in it, which continued till the village 

 of Tusom was reached. Near Tusom there appears to be a fault with an 

 upthrow to the east, and here the dip suddenly changes to west and west- 

 north-west, which dips continue to the great serpentine intrusion west of 

 Kungal thanna, to the east of which there is a strip of the slates which 

 have a generally westerly dip. In the whole of this section which* 

 though apparently an ascending one throughout by far the greater part 

 must have several repetitions, whether by faults or folding, I have not 

 been able to detect any separation of the beds into more than a single 

 formation. 



7. On the Chatik ridge quartzose beds are not uncommon and on the 

 General description crest there are one or two exposures of indurated 



continued. pipeclay. Under the scarp of the Kasom range, 



there are numerous exposures of green (chloritic) schists, probably meta- 

 morphosed by the intrusive dykes which are here not uncommon; in 

 some of the streams tufa was abundant, but in only one place, close to 

 the Easom village, was limestone found in situ ; the rock was a highly 

 metamorphosed dark marble with white veinings. Below the village of 

 Chamu Khuno in the bed of the Nelay Khong, there was an exposure 

 of fine-grained red slates ; in the country lying between Chamu Khuno, 

 Kachao, and the Kachao phung, the rocks are peculiar, a hard red coloured 

 porcelanous rock, probably a more metamorphosed form of the red slate 

 seen under Chamu Khuno, and structureless grey siliceous beds often 

 passing into pure chert were the prevailing types, besides these grey and 

 whitish slates and impure steatitic beds were seen. Near the deserted 

 village of Kachao, there is a considerable amount of interbedded volcanic- 



( 219 ) 



