14 BLANPORD : GEOLOGY OF NAGPUK. 



sandstone are seen In a stream. These have a steadier south or south- 

 south-west dip, which continues hence to the eastward as far as Bokhara. 



The rocks may be traced here and there along the base of the trap 

 hill south-east of Gotaikh^p^, and one or two 

 ridges formed of them are seen just west of 

 Bokhara. This locality is of especial interest, from being one of those 

 most frequently mentioned in Mr. Hislop's papers, and although no 

 large exposure of the rocks takes place, those seen demand a somewhat 

 closer description. 



The Kdmthis form a small ridge, stretching along the trap boundary, 

 which here runs nearly east and west. Trap is seen resting upon them 

 in the little isolated hill close to the village of Bokhara, again a short 

 distance south-west of the hill, and also at the base of the trap hill 

 about a mile west of the village. In all these cases, except the first, 

 where a few inches of silicious beds representing the infratrappean group 

 intervene, the trap rests directly upon the Kamthi sandstone. West of 

 the village, the uppermost beds of the latter are felspathie sandstones or 

 coarse grits, often stained with iron. They are not calcareous, nor 

 do they contain chert, as is usually the case with the infratrappean 

 group. 



The quarried beds which succeed in descending order have been well 

 described by Mr. Hislop.* I did not, however, observe the angular frag- 

 ments of fine sandstone which he notices as contained in them. The 

 principal rock is a hard compact grit, with a peculiar vitreous character, 

 and breaking ^ith a conchoidal fracture. In the quarries to the west- 

 ward, hardened shales, pale bluish grey in colour, rest upon this grit, and 

 contain imperfect plant remains ; and near the village, at the side of the 

 road which passes south-west of the little trap hill already mentioned, 

 Phyllotheca is found in some shaley beds. Mr. Hislop mentions a car- 



* Quar. Jour. Geol. Soc, Lond., xi, p. 369. 

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