THE COUNTRY EAST, ETC. 163 



Kaimur series but somewhat more quartzitic. This rests on coal 



black splintery shales underlaid by limestones which have a local dip 



of 76 to N. 13 W., but becomes less lower down the section. 



The upper beds of this limestone resemble the Rohtas, but 



descending the section they pass into shales containing large black 



coloured calcareous concretions of the Kheinjua type. An almost 



continuous section of these shales, with occasional bands of impure 



sandstone, is seen till a band of limestone, about 40 ft thick, is met 



with. 



This is the limestone regarded by Mr. Mallet as his No. 7, and 



from the wording of the memoir where it is said 

 Limestone at Khattai. • o 



that " the outcrop recrosses the Son east of 



Hurma, at which village the limestone is seen, as mentioned at page 



38 1 /' it seems that he regarded this limestone as the one which is seen 



on the right bank of the Son west of Khattai. This was not 



Mr. Vredenburg's opinion, and having examined the section myself I 



can confirm his separation of the two limestones, of which that seen 



near Hurma belongs to a higher horizon than the other. There is 



consequently a gap in the section occupied by beds which are hidden 



by the Son, among which may be the continuation of the porcellanite 



stage. 



East of Hurma, to the boundary of Rewah, the exposures of lower 

 Vindhyan rocks are few and far between, the ground being deeply 

 covered in a thick sheet of recent deposits ; alluvial sands and 

 gravels covered by a fine-grained loam of asolian origin. South of 

 Deora some low hills of shales and ripple-marked sandstone are of 

 typical Kheinjua type. 



The boundary, as marked on the map, is largely conjectural. 

 South of Kaugi (Nowgai) the basement beds form a low hill composed 

 of a conglomerate of small pebbles scattered through an earthy ma- 

 trix. Southwards of Kosai (Kossai) the boundary can be traced, 

 and on resurvey the difficulties of interpretation, referred to in the 

 Vindhyan memoir, 2 of the section south of " Bergurrah " — Bargar of 



1 Mem., Geol. Surv. Ind., Vol. VII., p. 129. 

 8 Mem., Geol. Surv. Ind., Vol. VII., p. 34. 

 M 2 ( 163 ) 



