SON PLATKAU. 217 



The southern hill is part of a g-reat outlying' patch or basin of the 

 nummulitic rocks around the escarpment of which the carboniferous 

 limestones appear^ the two tog-ether forming* quite inaccessible cliffs some 

 hundreds of feet high in a narrow gorge south of Sodhi (or Sothe) and 

 south-west of Katwahi. At the head of this gorge, where it leaves the 

 flatter ground between nummulitic limestone hills, there are the remains 

 of a tolerably thick bed of purple gypseous clay associated with sandstone 

 layers and blackish shales. The gypsum or selenite is in clear plates, 

 and the beds are probably a fragmentary portion of the upper part of 

 the speckled sandstone group brought into this position by concealed 

 faults. 



The hills to the eastward are partly formed of carboniferous limestone 



and partly of an extension of the main mass of the 

 Hills east of Katwabi. 



Son nummulitic limestone. At the base the latter 



is hard, grey, compact and lumpy, overlying 15 feet of white powdery 

 sandstone. A small band of shales occurs below, and under these the 

 hsematitic clay bed which is often found near the base of this series. The 

 layer is here 5 feet in thickness, but is always rather irregular, and 

 in this neighbourhood sometimes entirely absent. Below the hsematite 

 are dark and light grey triassic shales, with some gypsum and ferru- 

 ginous nodules and bands, the whole being 20 feet thick. Near these, 

 and apparently coming from beneath them, is strong crinoidal lime- 

 stone of the carboniferous group, weathering quite red, overlying a 

 mass of the compact fossiliferous limestones of this group. In a little 

 valley between two carboniferous limestone hills here, and leading 

 down to the Katwahi stream, close to the village, there is a green 

 and red soft shaly band near the top of the speckled sandstones, 

 without the usual quantity of lavender or other clays that usually inter- 

 vene between these and the carboniferous group. Some 60 or 80 feet 

 of these sandy and red clay beds of group No. 5 are visible, but are 

 obscurely exposed. The rest of the hills in this neighbourhood form 

 very rugged ground, and the limestone beds are frequently sharply 

 contorted. 



D -2 ( %U }. 



