SEC. 10.] NORTH -WESTEEN KUTCH. 26S 



A few yards farther down the stream, a nodular or concretionary 

 portion of the trap with a distinct but low dip to the south shows a 

 transition into the soft unetvjous beds by alternating- rugged layers of 

 greenish amygdaloidal trap with others of white and pink clay- 

 ? lithomarge — greasy to the touch. Some of the trap is earthy and soft^ 

 or vesicular, the cavities being filled with brown hsematitic segregations 

 or infiltrations. 



Just to the west of this spot the Jurassic sandstones appear in 

 force at a little distance from the bank of the stream, where they 

 may be either faulted or have formed an old cliff face against which the 

 traps were deposited. 



They also occur at the surface of the ground above, form a hillock 

 traversed by small 'reefs,' and are seen in a well which has been 

 sunk through them to a depth of 40 feet. They are here quite hori- 

 zontal, consisting of light pink and variegated beds with one ferruginous 

 layer 18 inches thick. 



Following the section to the southward, a large oval hilly mound 

 of dark trap (2) rises among the ravines and banks formed of the 

 softer earthy beds No. 3, the lowest of the latter being a variegated, 

 breeeiated, thick irregular earthy band enclosing large concretions of 

 trap, both these and their matrix having a highly decomposed appear- 

 ance. 



Close to the southern end of this mound in a ravine or nullah 



coming from the eastward are situated the alum 

 Alum shales. 



works of Mhurr. The soft deposits here have 



been greatly worked among, artificially disturbed, and exposed to the 



weather, but the variegated soft breeeiated band last mentioned is that 



which contains the bed or beds worked for alum. 



These are not exposed at the surface, but are reached by narrow 

 pits and passages (barely large enough to admit the body of a man), 

 ^k ( 263 ) 



