90 GK0L0GY OF THE SON VALLEY, ETC. 



In addition to these schists which we may safely regard as altered 

 Rocks of doubtful tu ff s j the strata of the volcanic bands are occa- 



sionally associated with various rocks of puzzling 

 appearance, and for which I can offer yet no definite suggestion as to 

 thei r nature or mode of orio-in. 



Such is T U r which consists almost entirely of epidote and quartz. 

 n ., , The quartz is continuous over large areas. Both 



Ouartz-epidote rock. , * ° 



minerals are much obscured by a white opaque 

 substance which is very finely divided. It occurs S. E. of Maoghun 

 associated with the volcanic rocks ; but the exposure is not clear 

 enough to make out its relation to them. 



reV however is clearly interbedded. It occurs immediately north 

 n of the most northerly run of Agori jaspers, on 



Quartz-calcite rock. . , 



the road from Khattai to Maoghun. In the 

 hand-specimen it has the appearance of an impure limestone, green 

 in colour, mottled blue with more coarsely crystalline patches. Under 

 the microscope it appears to consist almost entirely of an intimate 

 mixture of quartz and calcite (or dolomite). Skeleton and fern-like 

 forms of an opaque white or yellow substance are abundantly 

 scattered. Some portions of the section are bounded by such regular 

 lines that they have quite the appearance of pseudomorphs. These 

 portions are richer in the carbonates, and the opaque microlites 

 are absent from it. The rock gives the impression of being entirely 

 pseudomorphous. 



j 1 -^ collected east of Jungel is very similar, but with a more 

 confuse and brecciated appearance. In addition to the minerals 

 contained in Jgg, there is chlorite, serpentine, chalcedony and mag- 

 netite, the latter mineral having also a pseudomorphous appearance. 



J.— Conclusion. 

 We may conclude by saying that it is well established that an 

 extensive series of basic volcanic rocks occur amongst the Bijawars, 

 particularly in the Son region. These volcanic rocks consist of both 

 lavas and tuffs. 



( 30 ) 



