PART 1.] McMahon ; Notes of a tour through Tlungrang and Sjjitt. 
(35 
The Sliigri moraine passed, the talus of the mountains on tlie left bank of tlic 
Chandra consists of nothing hut blocks of central gneiss, and finally that rock 
itself crops out in situ on the road side. 
The absence of blocks of foreign rocks, I notice in passing, is hardly favour¬ 
able to the view that the glaciers of the upper Chandra became confluent and 
flowed down the valley in recent geological times. 
The central gneiss of the Chandra valley is often granitoid, and is penetrated 
by the albite granite (Memoirs, vol. V, p. 170). It extends to near the top of the 
Hampta pass (elevation 14,000 feet), where mica schists show under it, dipping 
north-west. Descending into the Kulu valley the gneiss shows for a considerable 
way, when it is succeeded by mica schi.sts. The dip fiat on the top of the 2 ias,s, 
gradually veers round to west, and this again brings down the gneiss. The dij?, 
which is usually low, wavers about sometimes in one direction and sometimes 
in another, being south-east at Jagatsukh and north-east at Dwara. 
The continuance of the central gneiss in the micaceous and silicious schist 
beds, up to a mile north of Naggar, is attested by the presence of angular blocks 
on the road side that have tumbled down from cliffs above. From this point to 
Bajaura the metamorjihic rocks consist principally of a dull brown mica schist, 
that smells earthy on the fractured surface, and generall} does not show any 
indication of mica on its weathered surface. 
The section between Sultanjmr and Narkanda has been described by Mr. Mcd- 
licott (Memoirs, vol. Ill, p. o7), but I may briefly note, to compilete this sketch, 
that the Sutlej valley limestones suddenly cro^J uj) about a mile south of Bajaunr, 
and abrupitly disaj)jioar about two and half miles nordh of IVlanglaur, where schists 
similar to those described as occurring between Naggar and Bajaura rc-apiJcar. 
The gneiss shows in foreo several times between Kot and Dulash, and frequently 
from thence down to the bed of the Sutlej. On the Kotgarh side, the dip coin¬ 
ciding with the slojje, it is the only rock seen for 1,900 feet of vertical height 
above the river. From this point to within a few miles of Mattiana the rocks 
consist of schists similar to those south of Naggar in the Kulu valley. 
The “graphitic schists ” on the noiih side of the Jalori pass* arc very similar 
to rocks seen I’ound Kotgarh, and between the latter jilace and the Nogli river 
south of Rarapur. These I’ocks jiuzzlo me very much. They are dark carbon¬ 
aceous schists or slates with a micaceous glaze on them, and by their di.sintegration 
make coal-lflack earth. They are associated with lime.stonc which occurs in more 
than one pflace on the north side of the Jalori pass, and a band of which crops u]i 
in several places under Kotgarh and along the Sutlej valley up to the Nogli 
river. Arc these Infra-Krol rocks, lying closely on the crystalline scries, or do 
they belong to the latter ? The former would aj)p)ear to me probable. 
But without di’awing any inference fi’om these doubtful rocks, my observations 
during the jjresent and jirevious tours show that, on the north as on the south of 
the central gneiss, the ujjper calcareous gi'OU^JS of the great palccozoic series 
originally overlapped the slaty scries and rested on the crystallines. 
' Mom. Cx. 8. 1., Vol. lll/pt, 2, p, 57. 
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