COUNTRY NORTH OF THE SON AND WEST, ETC. I45 



of the limestone — the Rohtas limestone — occupying the topmost part 

 of the lower Vindhyan beds. To this mass of argillaceous and 

 arenaceous beds — ue. t between the Rohtas limestone above and the 

 Porcellanics below — the term " Kheinjua" has been given. It was 

 first so applied by me in my notes on the Son Valley. 1 



Sub-division of the Kheinjuas.— -The beds thus treated as forming 

 The Kheinjuas sub- one independent stage are, however, consisting 



divided into 8 zones. as they do of a i ter nate shales and sandstone 

 with limestone, susceptible of arrangement into distinct zones. As 

 the superficial deposits prevail largely over the eastern parts ol the 

 area under consideration, the Kheinjuas are consequently better 

 exposed and studied in the western parts. Taking the neighbourhood 

 of Ramnagar for a typical section, they (the Kheinjuas) were found, 

 on examination, to be divisible into 8 zones z : — 

 (In descending order) 



Zone VIII. — Argillaceous shales— 



Containing calcareous concretions and fair abundance of 

 limestone beds ; arenaceous element insignificant and 

 small where not almost entirely absent. 



Ramnagar stands on these. 



Zone VII. — Limestone band — 



Limestone pure ; no calcareous concretions as a rule ; no 



arenaceous or argillaceous element present. 

 This is the limestone band between the two villages of 

 " Khajuri" ol 1 ap, south-east of Ramnagar. 



Zone VI— Shales— 



Arenaceous and argillaceous, with thin-bedded sandstone ; 

 ripple-marked • altogether free from calcareous beds. 



On these stands the southern one of the two villages of the 

 name of " Khajuri" of map. 

 Zone V. — Limestone with shales — {or rather shales with some limestone). 



Shales reddish, sometimes calcareous, at other times not 



often forming bulk of the zone. Limestone very impure 



and interbanded with sandy layers showing 



ripple-marks; sometimes brecciated and contain 



cherty and quartzitic inclusions. 



1 Rec, Geol. Sutv. Ind., Vol. XXVIII., pt. 4, p. 145. 

 a Rec, Geol. Surv. Ind., Vol, XXVIII., pt. 4, p. 146. 



( '45 ) 



