Northward Extension of Derrinal Conglomerate. 207 



principally of claystone\ but there are odd examples of well 

 rounded lydianite, porphyry, granite, etc., also the conglomerate 

 beds are rudely stratified and are interbedded with well stratified 

 shales and sandstones. In some of these beds Glossopteris and 

 other plant-remains are abundant. At one point on the N. side 

 of the gully, a little coal was observed, but whether this was a 

 loose block or not is uncertain. The gully bifurcates a few 

 chains further up from where the conglomerate shews nearest the 

 rivei", and after a few chains more of conglomerate, shales and 

 sandstones are traversed in a westerly direction, the Carboni- 

 ferous C?) beds again occupy the surface. The width of conglo- 

 merate and alternating beds here would be about 12 chains from 

 E. to W. The beds all dip at low angle to the W., but whether 

 this is due to a kind of false bedding or whether to subsequent 

 faulting remains to be worked out. West at a short distance is 

 granite, south one mile is an outcrop of Gympie Beds, shales, and 

 sandstones, higlily inclined and traversed by a mineralized quartz 

 vein. Newer than these are the Carboniferous (?), sandstones and 

 shales which are free of quartz veins. On the upturned edges of 

 these Carboniferous (?) beds is the glacial conglomerate and 

 associated shales, sandstones and coal seams. Again on the 

 upturned edges of the Derrinal Conglomerate and associated beds 

 which dip at angles ranging from 26° to 56° to the AV., is a 

 Post Pliocene deposit a few feet thick, consisting of soft loose 

 orit, and this in turn is covered by Recent sui-face soil from 1 to 

 3 feet thick. 



An immense area of Derrinal Conglomerate nmst have been 

 <:lenuded to supply the great pebble beaches along the Severn 

 River with material so unlike any rocks now existing within 

 its present watershed. 



In Queensland the Derrinal Conglomerate is well shewn 

 resting on granite at Cherry Gully Railway Station, 187 miles 

 south of Brisbane ; it is observable in the cuttings along the line 

 for over a mile in length. The pebbles where weathered out, are 

 of the usual glacial character and of many varieties of rocks, some 

 show distinct scratches. The matrix is granitic detritus. 



1 Literally not felspathic porphyry. 



