152 



NERBUDDA DISTRICT. 



affords data for roughly computing the thickness, and taking advantage 



of this- it is found that the group is here represented by a minimum of 



600 feet, but it is probable that this estimate is very much too low. 



The character of this south boundary of this formation is not uniform, 



,, , . the beds beins; sometimes faulted against those of 



South boundary or ° ° 



these Rocks, t ] ie scn i s t Sj and sometimes found resting uncon- 



formably on them. 



The phenomena of the faulted part of this boundary will be fully 

 discussed hereafter, while the accompanying sketch gives a good exam- 

 ple of an unconformable junction. 



Fig 5. Section in stream W. end of Rawundeo Hill. 



TFTT 



{a, a,) Recent clays, sand and shingle deposited on a denuded surface 

 of the Tal cheer rocks. 



{b, b,) Talcheer beds: at the top the soft earthy sandstone, and sandy 

 mud beds are very regularly bedded (b, of list of sub-divisions) and 

 dip at a low angle. Below the Boulder-bed is seen : it contains 

 here some large blocks ; one of these was observed to consist of a 

 fragment of a Trap dyke, with some of the mica schist through 

 which it cut, still adhering. Such a fragment might be broken 

 now from the dykes seen in sites immediately below. 



(c,) The crystalline gneissose rock much contorted and foliated, here 

 principally micaceous and hornblendic. 



{d,) Granite — intruded among the schists, in one place the foliation of 

 the schist dips towards the surface of the granite, where in contact. 



(e 5 ) Trap dykes — one through the granite and one across the foliation 

 planes of the schists. 



