I-jS GEOLOGY OF THE SON VALLEY, ETC. 



lies under alluvium). But at h mile west by south of Ghungta 



(western) a very thin calcareous band makes its appearance, and is 



„, . .. traceable north-eastwards by Ghungta, fhala 



Calcareous band by J » » J 



Gin.n-ta, etc. anc j Ghidaora, where a double curvature, in- 



dicative o f the flexure which the rock-mass has here undergone, is ex- 

 hibited by the band. The band is lost sight of underalluvium by the 

 easternmost village of Ghidaora, and continues so until we reach a 

 point (Lat. 24 24''$, Long. 8i°4i') where, about one mile south-east 

 of Missirgama, a thin band, occupying about the same horizon and 

 probably a continuation of the band seen on the west, appears agairj 

 and is traceable east by north by Dowara as far as Pawa. East of 

 Pawa it is difficult to come upon any calcareous band in this horizon 

 except a patch here and there, as between Bhitari and Lakhaora and 

 also south-east by south of Lakhaora, until we come near tot 



Limestone band by Patpara, whence a thin band is traceable to a 



Patpara, point about § mile south of Koludi. Eastwards- 



from here and to the limits of the area under consideration the ground 



is so thickly spread over with alluvial and other superficial deposits 



as to render hopeless any attempt to follow the band further. 



On the stream that falls into the Son just west of Sahaol are 

 exposed, close to its mouth, a few beds (3 or 4} 



Li rrestone at Sahaol. . 



of a cream colored limestone, and a little lime- 

 stone is also seen on the left bank of the Son just south of SahaoL 

 These may be of about the same horizon as Zone II. But it is diffi- 

 cult to assign with any degree of confidence to their true position 

 any isolated exposures like these, so far away from the main band. 

 That the little limestone seen on the stream f mile south-west oi 

 Sahaol may not, on the other hand, extend far but probably dies out 

 quickly, appears likely from the rapid thinning out observed in these 

 limestone beds even within the width of stream itself. 



Zone ///.—The sandstone forming this zone is grey to white iu 

 color, generally fine-grained, hard, compact and 



Sandstone quartzitic. , . .,11 1 



quartzitic. From its hard, compact and quart- 

 zitic character, which has enabled it to resist denudation better than 



148 ) 



