Records of the Geological Survey of India. 
[vol. VII. 
Trias. 
or fault are some black shales much overrun by debris. They are probably a portion of the 
Spiti shales (jurassic) coming through from the other side of the hill. 
The road turns round a small shoulder of the hill here, and a few paces beyond are some 
shaly limestones with a five-feet band of shales, underlying about 150 feet, of hard dark-coloured 
ferruginous sandstones, shaly in their upper part. These dip at 70 D north-west, and have 
been referred to the “ Gieumal Sandstone,” Upper Jura of Dr. Stoliczka, (see Memoirs, Geo¬ 
logical Survey, Vol. 5, pt. 1). 
The road turns sharply here to the right, entering an open khud, and the next rocks 
seen are black and gray, strongly and thinly-bedded, lime¬ 
stones with some clay or rotten shale bands. The beds are 
steep, vertical, and bent over a nearly vertical axis. These limestones extend about 150 
yards from the sharp turn mentioned, at which distance they have a strongly oolitic texture, 
overlying a thin-bedded zone. They contain a few fossils of triassic aspect. Although they 
appear to overlie the Gieumal sandstone and a few beds of the latter, with 5 feet of black 
shale both inclined towards the limestone, occur immediately beyond it, the junctions seem to 
be on lines of fracture and the limestone does not resemble the description of the cretaceous 
beds resting on the Gieumal sandstone series of Dr. Stoliczka. 
Along with the small exposure of this sandstone and shale just mentioned are 100 feet 
or so of dark-coloured vertical limestone apparently belonging to the jurassic sandstone 
series, for a few beds of the latter, also vertical, are next seen, and a little further on, thin- 
bedded, black and gray shaly limestones are also nearly vertical or dipping at a high angle, 
north-west, indicating an apparent alternation of limestones in the sandstone series. 
Here another fault brings into the section contorted and vertical, dark gray and gray, 
thick and thinly-bedded limestones, seen for 250 yards. They are occasionally interstratified 
with shaly layers, and are at the further end of the exposure oolitic. In these beds traces of 
fossils are not numerous, but the rocks appear to be triassic. 
Next seen is a mass of about 80 feet of vertical solid blue gray ferruginous sandstone 
calcareous in places and resembling that referred to the 
Gieumal series. It contains traces of fossils, which, however, 
could neither ho extracted nor made out, and it seems to be enclosed between two lines of fault. 
Beyond this the road passes through vertical or highly inclined black and gray 
limestones, for 200 yards. They are partly thin-bedded 
alternating with shales, some are oolitic, and some largely 
composed of fragments of shells, among which are small oysters (one O. Haidingerii ?), easts 
of a large smooth Bivalve and of strongly ribbed shells, apparently Trigonice, also small 
Rfiynchonello! and some Gastropods. These are perhaps the most typical triassic rocks of 
the whole section. 
Apparently brought into junction with these limestoues by a reverse slip or fault, is a 
small quantity of vertical Gieumal sandstone, with some layers of black shale. 
Debris overshoots the hank for a short way, and at the 9th mile post, are gray sandy 
micaceous shales with limestone layers probably triassic, 
dipping to the eastwai'd at 155° and other angles. 
A few paces onward the dip changes, coinciding with a break in the rocks, and thin- 
bedded gray compact limestone which weather light yellow dip at 45° north by west for 100 
yards. They contain beds full of small Oysters, and are believed to be triassic. 
A very sharp turn in the road occurs here for another hundred yards, beyond which, 
gray, flaggy, and thin-bedded shales are seen, bent into bold curves, weathered of a light 
Trias. 
9th Mile. 
