«e5???2 



MALLET, VINDHYAN SERIES. 61 



are pebbles of red quartzite, most probably more-altered fragments of the 

 Gwaliors. Again in the hills north of Chuli it is impossible to separate the 

 Kymore sandstone from the breccia, the two rocks being interbanded. The 

 latter is here not of the pebbly variety, but of the more altered kind which 

 is generally seen lower in the section. It is observable that the Kymore 

 sandstone is far less (if at all) altered when it rests on the pebbly variety 

 of the breccia than when resting on the more silicious or compact variety. 

 The entire thickness of the Kymore sandstone here seems to be very 

 considerable, although, from denudation and alluvial covering, more than 

 fifty feet are seldom exposed. 



The stratigraphy of the Vindhyans here will be best comprehended 

 by comparing the accompanying section with the map, which latter 

 however does not, from its small scale, admit of details being introduced. 

 The strata are disposed in two synclinal troughs, (Fig. 8) the intervening 

 anticHnal having been denuded away.' The harder beds, namely, the 

 Kymore sandstone and breccia, the lower Rewah and the upper Rewah 

 sandstones, form a number of parallel ridges running north-east— 

 south-west; but the softer -^ds^, the Punna and Jheeree shales rarely 

 show above the alluvium which occupies the g-foumd. between ea«h ridge. 

 The corresponding ridges of the south-eastern synclinal curve rotiiid and 

 join at the south-west end of the trough and approach each other some=> 

 what to the north-east so as to bear some resemblance to a lengthened 

 horseshoe. The quartzite series underlying the Kymore breccia is 

 brought against the Bundairs on the south-east by the great fault and 

 is alsa observable along the outer side of the north-west synclinal in 

 the portion to the west of the section. It also makes its appearance 

 above the alluvium in two or three places under the Kymores along the 

 sides of the denuded anticlinals. The centre of the north-western, 

 synclinal is occupied by lower Rewah sandstone, but the south-eastern, 

 includes the still higher upper sandstone, 



( 61 ) 



