1866. ] the Western Himalaya and Afghan Mountazns. 125 
«, A band of greenish-grey trachyte with small rounded geodes of chalk- 
white albite. It weathers somewhat reddish on its outside and wears in 
rounded masses. Jt reminds one very much of some of the felstone of Bara- 
moola, Strike N. 15° W.—S. 15° EH. Dip Easterly 40°. But this stratum 
varies very much along its strike, becoming in places a ferruginous, rotten, 
augitic amygdaloid; in others a sandstone made of big rounded grains of 
quartz, of hornblende and of other voleanic minerals, with a calcareous cement 
which effervesces powerfully with acids, This sandstone forms slabs 1 to 1% 
inch thick, and superposed one over the other like bricks ina wall. Again a 
little further on, it is a fine, very compact, smooth laterite, passing gradually 
into a more sandy variety containing very minute spangles of white mica 
hardly visible in the day time, but which shine well by candle light, and also a 
few small rounded nodules of a pale green semi-lucent mineral. The variations 
of this bed along the strike seem to indicate a very shallow shelving shore or 
a pool of water, the bottom of which had been frequently disturbed by the 
appearance of lavas or other heated matter. The bed is about 165 feet thick 
at the outcrop. 
zt. Then the slate, blue and compaet, comes again, with occasional thin 
beds of sandstone or dark-stone: a coarse grained highly ferruginous amyg- 
daloid, a sort of peperfno, forms a bed 15 feet thick, and on the top of this, 
here and there, are patches of grey laterite. The slate and the sandstone 
alternate repeatedly in beds of more than five feet each, and this goes on for 
a thickness of about 160 feet. 
wit. A ridge of coarse, brown, slightly micaceous sandstone, in superposed 
slabs like a built wall, now makes its appearance. It strikes S. W.—N. H. and 
dips easterly 45°. This strike S. W.—N. H., meeting the strike of the preceding 
layers « and «i which is N. 15° W.—S. 15° E., leaves an open angle or yawning 
on the northern flank of the hill, and this is filled up by laminated slate, much 
broken and of various colours, a good deal of it being yellow. It is the yielding 
of this soft slate which has allowed the hard and unyielding sandstone to take 
a direction to the S. W. instead of to the S. 
The thickness of this sandstone ridge is about 45 feet, and that of the slate, 
which fills up the gap or yawning on the flank of the hill, about 40 feet. 
aii. Slate, hard but much cleaved ; about 80 feet. 
wiv. A ridge of very compact and massive baked clay, having a conchoidal 
fracture and large distant joints. It is yellowish grey in colour, with bands of 
lighter yellow: one would take it for a light-coloured basalt, if it were not for 
its trifling hardness, which is about that of slate. It appears to be a clay 
made up of silty mud, derived from basaltic and other voleanic rocks and 
baked after formation. Perhaps it would be best named ‘“ Massive Laterite.” 
The joints and the surface are covered with a rich brown iridescent oxide 
of iron or a black crust of the same material. This rock is nearly vertical, 
and is neara fault of considerable extent which cuts the hill right across; 
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