1866. ] the Western Himalaya and Afghan Mountains. 183 
28. Limestone, patchy blue and yellow; argillaceous, ........... 20 ft. 
29. limestone, very argillaceous and having a pure lustreless grey colour, 
and being striped on section, owing to bands of a lighter colour. The rock 
is So compact and fine-grained that it resembles a fine greenstone in structure. 
It is traversed by bands of rougher stone and also by bands of blue limestone. 
It weathers rugose and pitted,,.,..csecss.00s BABIES EDEEISCOTSTIaR HS REIIE ee arterial 0 lah a 
BO, lbmmesiverne IK FS}, ascn0 goopdoncness aoppooouG su DoD acd doaDbeoDoycDKGGnoD FAL) ain; 
SeMmRIGTTVES TOME pliikcey 2Os As hiis coataeslallsivieeictileelsecleceloescceisidclacteldse dua sclsiolec 15 ft. 
32, Limestone, as white as chalk, tae hard. Tk j is “fall of geodes like an 
amygdaloid, the geedes being filled or lined with minute crystals of spar. The 
rock weathers in rounded bosses like granite or trap. It appears to have 
suffered a metamorphosis. It is probable that the calcareous mud which 
originally composed it was thrown into a bubbling condition by the infiltration 
of heated vapours or the immersion of hot volcanic products into a shallow sea. 
It presents no fossils or traces of fossils. The bed is not lenticular, but 
extends regularly along the strike the whole length of the hill, being 
conformable to the other loa leys Baa ed ucnoasiicoscoabocas BGG SCOCRE SOC eM OR IE 
83. Limestone similar to 31, ...........-. Hao seine reyciaetes 5 ft. 
34, Marly, dark bluish grey and rough Heese povnscaeoanossaneo «thE 
2, Ibias B38) eileen) sdoceaqgadodonconsoood sean Shae Vara vi linia Ua ybg re 
36. Hard and cherty jets: salels grey or 1 doa. oleae. It contains 
a few geodes like No, 32. It weathers pitted and rugose; no 
OSS (DP) ereleectlal|-tle ns sincielsas « sesececteeeeeerneseses sesetseesesteecsreesssecee es 2 ft, 
27. Thame stuereve) Inte) BYE Bod gccn6a.coo Boo cop bod non'360 ood odo\0S4 too bod 005803 sco OCG 5 ft. 
The last three beds are a good deal denuded, owing to their being 
at the top of the hill, which is narrow and barren. 
46. There can be no doubt of the Islamabad hill being composed 
of Weean limestone; the argillaceous and arenaceous condition of 
the rocks is exactly what we have seen in other localities where this 
sort of limestone is developed. The fossils are very unsatisfactory, 
being extremely comminuted. I have found, however, one Spirifera 
and one Athyris which are to be seen in the beds at Weean. 
I have seen also many sections and outlines of large bivalves 
(Aviculo-pectens and unio-like Anthracosié) similar to those found 
near Mutton. The Foraminifere are also extremely numerous, 
and the fossil shell which gives on the surface of rocks an outline 
resembling a small pair of spectacles, is very common amongst 
the debris of comminuted shells. The upper beds of the hill, 
from 29 upwards, contain no fossils and have a peculiar appear- 
238 
