206 Capt. Hutton's Geological Report. [No. 111. 



last mentioned rock varies much in colour and in texture, the lowest stra- 

 tum being white, and scarcely distinguishable from quartz rock, but chang- 

 ing gradually to a faint tinge of pink, becoming deeper as it passes up- 

 wards, until its colour is of a dull purplish hue. 



These strata are sometimes separated by a very thin layer of soft 

 whitish marl. The crest of the Hungrung Pass is 14,837 feet above the 

 level of the sea, and is composed of dark blue limestone. The range on 

 which this Pass is situated divides Kunawur from Hungrung, — a district 

 inhabited by Tartars, who are subject to Bussaher. 



Descending from the Pass to the village of Hungo, the road passes over 

 numerous alternations of blue limestone and greywacke slates, resting upon 

 white quartz, which lower down gradually passes into a greenish variety 

 of the same rock. 



These strata all dip to the S.W., and are probably an outcrop of those 

 which run in a N.E. direction from behind Soongnum, and thus shew the 

 effects of what may be termed a double upheavement, or lifting of the same 

 strata at two different points. The lofty granitic peaks which tower up to 

 the right of the Pass, at once shew that they have been instrumental in 

 forming the S.W. dip, and it is more than probable that the same rock 

 might be discovered also protruding through the strata on the opposite 

 exposure. 



The following partly imaginary section of Hungrung, may serve to ex- 

 plain my meaning : — 



(See plate)— Fig. 3. 

 Supposed Section of Hungrung Mountain. 



Strata of greywacke slates are met with for a few miles after leaving 

 Hungo ; but they disappear as we approach Leeo, or rather, from the 

 great descent of the road, they are left far above, while the base of the 

 mountain is found to be a dark coloured gneiss, traversed and inter- 

 sected in every direction by veins of white quartz. 



Leeo stands in a kind of basin, surrounded on all sides by lofty hills 

 of granite and the same dark gneiss; but the lower parts of them are 

 overlaid by strata of the secondary series, consisting chiefly of greywacke 

 and shales. On the sides of the surrounding hills exist strong indications 

 of the former presence of a lake, in the lines of water-worn stones 

 and pebbles that now rest many hundred feet above the river Lee. 



These appearances were long since pointed out by Dr. Gerard, who 

 though knowing nothing of geology, was at once forcibly struck with 



