208 Proceedings of the Royal Society of Victoria. 



At Silver Wood Railway Station, 179 miles from Brisbane, 

 nearly horizontal glacial conglomerate rests on the upturned 

 edges of the much contorted Carboniferous (?) beds. Here the 

 pebbles are of a great variety of rocks glaciated in form and in 

 some cases polished and scratched. As at the Ashford locality 

 the conglomerate rests on Carboniferous (?) beds, but the over- 

 lying shales, etc., were not observed. The conglomerate continues 

 for some miles further northward along the railway tow;irds 

 Warwick. Similar deposits of the Derrinal Conglomerate should 

 be found still further north, both E. and W. of the Dividing 

 Range. If the occurrence of the same conglomerate in South 

 Africa (the Dwyka Conglomerate) is any guide then the 

 Derrinal Conglomerate may be looked for at intervals right 

 round Australia at the base of the Permo-Carboniferous, and 

 later rocks that occupy so great an area of the interior of the 

 continent. 



Apart from the scientific intei-est which centres in the 

 Derrinal Conglomerate as a geological bench-mark coiuiecting 

 Australasia with South Afiica and possibly with Asia, and 

 from the speculation it excites as to what conditions could 

 have prevailed to produce a conglomerate so protean in its 

 aspects, there is the very practical fact that the Derrinal 

 Conglomerate forms the floor of all our valuable coal seams, 

 and, what is almost as important in this droughty land, also 

 the floor of the strata from which artesian water is obtainal)le. 



