lxxxiv Report of the Mineralogical Survey [No. 126*. 



width to a point below the affluence of the Burral, and then gradually 

 subsides about half a mile. Below this point occurs a third similar flat, 

 doubtless composed of the same materials, and containing about half a 

 square mile of level ground. It is worthy of remark, that the three 

 are, as nearly as the eye can judge, of the same level. It should also 

 be noted, that in the two, the structure of which appear, nothing like 

 strata or a division, nor distinction of deposits occurs ; the great and 

 small boulders are indiscriminately mixed in every part, and the whole 

 has the appearance of being the effect of some very powerful, but 

 sudden or short-lived cause. The fragments most abounding are 

 quartz rock of all colours, next to this is hornblende schist, with very 

 few of granite or gneiss. 



183. The last rock observed in the Burral glen was a blue talco- 

 argillaceous schist, with a pearly lustre. In the bed of the Jumna, 

 close by the suspension bridge, a mass of limestone occurs. On crossing 

 the river, a rock of limited extent is met with, and of very anomalous 

 character. It is probably a mixture of chlorite quartz and felspar, the 

 latter not abundant, or the green ingredient may be some variety of 

 hornblende. The structure appears to be laminar, yet the fracture is 

 such as to indicate the amorphous. It is a tough rock, and breaks 

 with sharp corners. It is succeeded by extensive strata of a talco- 

 argillaceous schist, the prevailing colour of which is an olive brown. 

 The dip appears to be N. W. the same as that in the Burral glen, 



184. From Burket to Bimsa, the prevailing rock is chloritic schist, 

 often inclining to argillaceous, often soft and decomposing, intermixed 

 with beds of quartz rock which generally incline to a green colour. 

 The earthy, or decomposing and the more perfect straight laminar 

 types, are often found in the compass of a few feet, nor can there be 

 any doubt of the unity of this formation when we view it in nature ; 

 although a collection of the specimens, unless extremely numerous, 

 might exhibit some very striking contrast. Frequently, the laminae are 

 extremely thin, quite flaky, and in this case they are seldom separable 

 of any size. From such a rock, it is impossible to detach a specimen, 

 for on the application of the hammer it flies into showers. When the 

 colour inclines to green this rock is generally soft, when to blue it 

 is hard. No good examples of strata are met with on this line, the rock 

 seldom appearing but in surface patches of no great extent. 



