NOTE. 



DuriBg the last cold season (1868-69) an opportunity occm-red of re-examining 

 some portions of tlie lower- Vindhyan area in the Sone vaUey regarding the geological 

 relations of which some uncertainty existed. At page 34 it is suggested, that the bottom 

 limestone of the lower-Vindhyans may, perhaps, not overlie the bottom conglomerate, 

 but pass into it laterally ; the calcareous rock being chiefly found in the low ground, 

 and the arenaceous in the higher. It would seem, however, that the more frequent oc- 

 currence of the conglomerate in elevated positions, such as the tops of hills, is due to 

 its forming the base of a series of inclined beds. It therefore as a rule outcrops at 

 higher levels ; but many cases are met with where a hiU-slope is formed of these 

 conglomeritic beds fi-om the summit to the lowest ground, where they are on a level 

 with those of the limestone. Koodyla hiU south of Agoree-Khas famishes an 

 instance of this. The steep western face of the hill exposes slate rocks, but the eastern 

 slope, which agrees in inclination with the dip of the beds, is of the conglomeritic 

 sandstone from the top of the ridge down to the low ground near the left bank of 

 the Eehund. No rock is seen in the river, but on the right bank the limestone comes in 

 in force. Wherever the two rocks are met with in the same locality, the conglomerate 

 is invariably found between the limestone and slates, numerous examples of which may 

 be found along the line of junction of the lower-Vindhyans and slate series eastwards 

 from the Eehund, where both limestone and conglomerate are thrown up at high 

 angles, and where, consequently, the idea of a lateral transition is inadmissible. Such sec- 

 tions may be found at Kujrahut, at Joorwani ( about 2 nules to the east,) and near 

 the right bank of the Eehund. Cases occur where the conglomerate is absent, and where 

 the limestone is therefore in contact with the slates, as in one place a couple of miles 

 west of the Kunhur Eiver, and also apparently in the Sone at Agoree-Khas where some 

 pebbly limestone rests on the jasper beds of the slate series. Where, however, both rocks 

 occur together the conglomerate has invariably been observed to occupy the lowest 

 position in the section. The conglomeritic character is chiefly confined to the lower 

 portion, the beds near the bottom being generally a conglomerate, and sometimes a 

 coarse one, while the higher strata are of a fine-grained homogeneous sandstone ; the 

 transition from one variety to the other being, however, gradual. Between Agoree-Khas 

 and BurdheeX(vide page 31), this conglomerate is met with in two or three places, 

 rising in small lulls above the alluvium, but it is entirely obscured in the intervals by 

 the latter, or very possibly it is in places absent. 



In speaking of inliers at page 44 one such is mentioned as occurring at Sulkhun^ 

 north-east of Agoree-Khas. There, isolated in the alluvium, a low hill occurs, in which 

 the strata dip north-east at 10°-15°. Crossing it from south-west to north-east, 

 or in ascending order of the beds, we find, firstly, a brown breccia in which greyish- white 

 angular fragments are included in a dark brown ferruginous matrix ; then a thin band 



( 127 ) 



