1 4$ GEOLOGY OF THE SON VALLEY, ETC. 



This zone is exposed on the Nagour Nadi (stream) at f 

 mile south-east by south of the southern village o£ 

 "Khajuri " of map. 



Zone IV. — Shales . Arenaceous and argillaceous; much ripple-marked j 



with thin-banded sandstone, often quartzitic. 



Zone HI. — Sandstone . Thick-bedded, grey and white, compact and quartzitic. 

 This forms the scarp one mile north-west of Deora. 



Zone II. — Limestone with shales — 



Limestone purer than No. V ; shales little developed 

 by Deora but better developed and seen by 

 Sukwari at the junction of the Andhiari with the 

 Mahanadi (Lat. 24 5', Long. 8i° 2'); here the 

 shales are argillaceous, greenish and non-calcareous 

 and free from ripple-marks. 

 This is the limestone band seen just at the southern fool 

 of the sandstone scarp one mile north-west of Deora. 



Zone I. — Shales and sandstones — ■ 



Shales greenish and laminated j sandstones generally 



thin-bedded. 

 Deora stands on these. 



In the neighbourhood of Deora the beds of zone I are further 

 Zone I further sub- sub-divisible, in descending order, into: — 



divided. 



(a) A thin band of yellowish grey quartzitic sandstone, moderately fine- 

 grained, passing- downwards into a finer-grained darkish grey 

 rock. 



(b) Finely laminated pale greenish argillaceous shales, with occasional 

 arenaceous bands. Well exposed on the Nagar Nadi just 

 above and by the Temple at Deora. 



[c) A thick band of sandstone, in places thick-bedded and quartzitic look- 

 ing and light grey to yellowish in color, first appearing a little 

 south of the Temple at Deora. This forms the very base of the 

 Kheinjua stage, resting on the Porcellanics below. 



Further details relating to the different zones of the Kheinjua 



Stage. — 



Zone /. — The sub-divisions of this zone [i.e., into the sub-zones a, 

 b and c) as indicated above, from the section 



The Kheiniuas. ■ . t - ., 



Sub-division of zone I near Deora, are not traceable tar south-west or 



not traceable far. . ,-. . ,1 



north-east from Deora, because, on tne one 



( m6 ) 



