i860 ] the Western IJimaJaya and Afghan Mountains. 201 



in the Wastarwan and Zebanwan, and both asb and slate are occa- 

 sionally cellular or amygdaloidal. There is neither limestone, granite 

 or porphyry among Captain MacQueen's specimens, and I believe 

 therefore that the two last rocks at any rate do not occur in these 

 mountains, as pieces of granite and porphyry generally attract the 

 attention amongst the dull ash-rocks and would not have failed to form 

 part of the collection, if they had existed. It is very possible that 

 remains of beds of limestone are to be found amongst the spurs of 

 the hills. 



On the north of the Woolar Lake, many mountains of no great 

 height form a sort of amphitheatre. They are nearly entirely 

 composed of amygdaloidal greenstone, ash and slate interbedded, 

 but near the village of Bundipoor, about two miles east of the 

 road, some beds of limestone are seen. Mr. Drew has kindly sent 

 me some specimens of it that arc a llesh-coloured, sometimes 

 greenish, very arenaceous and argillaceous. They are not at all 

 crystalline, but contain an enormous number of encrinite stems 

 transformed into spar with a cleavage oblique to the axis of the 

 stem, so that when the section of a stem weathers, it appears striated 

 across. This crystallisation has destroyed the structure of the stem, 

 but the central canal is seen in a few specimens. We have seen 

 this rock well developed at Manus Bill, towards the end of our section, 

 where the beds of flesh-coloured limestone alternate with grey sandy 

 limestone containing crinoid-stems transformed into a spar as black 

 as coal. (See 35 of the section of Maims Bal). The limestone of 

 Bundipoor is therefore Weean limestone. 



On the west shore of the Woolar lake, the Taltiloo and the 

 Clival koot present perpendicular cliffs of volcanic rocks descend- 

 ing into the water. From a boat on the lake, it is easy to 

 observe the usual thick and confusely bedded masses of greenstone 

 and amygdaloid forming the centre of these hills, and the more sloping 

 and regularly stratified layers of ash, laterite, agglomerate and 

 slate well developed, in the long spurs which descend on all sides. 

 The whole mass of hills appears to be made of volcanic rocks, and the 

 lowest spurs which approach the shore of the lake present no fossilifer- 

 ous beds. Of the higher peaks, the Kahoota, Manganwar and Sheri 

 Bal, I know nothing, but there can hardly be a doubt, however, of 

 their being volcanic in their formation. 



