t50 MALLET^ VINDHYAN SERIES, 



to the south-west. North of the quartzite sandstones and resting uncon- 

 formably on them are 300 or 400 feet of a very peculiar breccia which would 

 appear to represent the Kymore conglomerate, although it is lithologically 

 very different from that rock as seen in Gwalior and Bundelkund. It is 

 far more like the 'hornstone breccias' of the Bijawur series, and 

 still more resembles the Tirhowan breccia, but the upper part of 

 it becomes conglomerate and contains undoubted pebbles derived 

 from the Gwalior series imbedded in a sandstone matrix. The 

 upper portion of the breccia also was observed in one place (where the 

 conglomeratic part did not exist) to alternate with the lower beds of the 

 Kymore sandstone. The breccia in some places is obscurely bedded, but 

 it generally occurs in great masses devoid of any structure. It presents 

 some variety in appearance. It is often seen as a compact silicious rock 

 very peculiarly banded. The bands are very fine and irregular, and twist 

 about in all directions ; the rock at the same time often containing small 

 cavities lined with quartz crystals. In other cases the laminae are quite 

 parallel and regular. In others again the rock is yellow and the laminae 

 broken and twisted. In another kind numerous angular fragments of a 

 white finely-laminated silicious rock, very sim il ar to the fijst variety, are 

 imbedded in a compact yellow silicious matrix. Similar fragments are 

 also found imbedded in a white sandstone matrix. Again in places 

 undoubted Gwalior pebbles are found, much altered, mixed with quartz 

 pebbles and imbedded like the last in an arenaceous matrix. 



In no place are all these varieties seen in one section, and that con- 

 tainino" the Gwalior pebbles is less constant than the others. None of 

 them appear to admit of any separation ; they pass into each other im- 

 perceptibly ; for instance near Thom, the conglomerate containing Gwa- 

 lior pebbles, although here only a few feet thick, is better developed than 

 anywhere else. The pebbles are altered and become more like red quartz- 

 ite although still retaining the structure of the Gwaliors. Below this 

 ( 60 ) 



