204 Capt Huttoris Geological Report. [No. 111. 



A few miles from Sarahun, on the right bank of the river, an interesting 

 appearance presents itself in the disposition of the strata. The dip which 

 up to this point has been pretty uniformly to the N. E., now gradually rises, 

 and preserving for a short distance a nearly horizontal position, at last lifts it- 

 self abruptly, and dips back again to the S. W. at the same angle of about 45°. 

 From this disposition of the strata it becomes evident, that they have 

 been lifted or upheaved at both ends, from the horizontal position they 

 once had, by some volcanic force. The lowest strata exposed to view 

 at this spot are on the right bank of the river, nearly even with the water, 

 and form a complete arch immediately under those strata which dip to 

 the N. E. I annex a slight sketch made on the spot, which will serve to 

 show the position of the rocks, better than a description. (See plate) — Fig. 2. 

 Beyond this, as we approach Traada, a fine white granite is observed, 

 containing large scales or crystals of mica, and farther on still, about 

 Nachar, white felspar becomes abundant, imbedding the same mica crystals, 

 and forming the first division of the granite of some geological writers. 

 Quartz also occasionally entered into its composition and formed true 

 granite, with which were found hornblende and mica slates, porphyritic and 

 granitic gneiss. In some instances where the hornblende and granite were 

 in contact, the mica of the latter rock assumed a black and glossy appear- 

 ance, producing a variety of granite of some beauty. 



Proceeding from Nachar, the road passes over formations similar to those 

 already mentioned, and a few miles lead down to the Sutledge, which is 

 crossed by a good broad Sangho. At this point the rocks rise abruptly in 

 huge masses on either side, confining the river to narrower limits, and 

 affording a mere passage for its waters. 



These rocks are of gneiss, and the stratification which previously had 

 often been indistinctly discernible, now ceased altogether, and the beds 

 presented a shattered and amorphous mass,— a circumstance by no means 

 of rare occurrence among this class of rocks. 



From the sangho to Chergong the road still continues along the bank of 

 the river over beds of boulders and broken rocks of every size, consisting 

 of granite, gneiss, mica, and hornblende slates. Here too cyanite again 

 occurred in quartz, and crystals of crysoberyl (?) in granite. 



From Chergong to Meeroo the strata of gneiss are often laid bare by 

 the descent of streams from the snows above, and the dip is seen falling 

 to the N. E. at about the usual angle of 45°. Beyond this place occur thick 

 beds of mica slate, containing garnets in profusion, and often, from the de- 

 composition of the rock, the whole road is strewed with garnets of various 

 sizes. Beneath this bed occurs one of white quartz rock, which is seen 

 rising from the edge of the Sutledge to about 3,000 feet in thickness. 



