Mar. 81, 1908. The Queensland Naturalist. 
31 
volcanic agglomerate from the base of the Ipswich also 
occur, and it is singularly full of pebbles and boulders of 
the jasper above-mentioned. Secondary quartz, in the 
form of double pointed crystals, exquisitely clear, are common 
in some places, as at Darra and Wolston, and small pebbles 
of sapphire, topaz, and garnet, are far fron. rare, whose 
significance i.s evident. These gravels puzzled use much 
and gave rise to dreadful thoughts. If thej- vere not here 
in Queensland, but say, in Lincolnshire, ' I should have 
unhesitatingly .said “glacial.” 
Mr. C. C. Brittlebank, of Bacchus Marsh, Victoria 
the well-known • authority on Australian glacial deposits’ 
carefully went over the ground with me, and expressed the 
same opinion. The conclusion I am driven to is that they 
do, m many places, show evidence of ice and snow action 
and at present I incline to the belief that they represent 
conditions m which the winters were coM, the streams and 
lagoons frozen, the hills snow-clad, and that in spring time 
the melting snov gave rise t.i floods, and the breaking up of 
the ice caused the big boulders to be floated off a mile or 
two from their point of origin. I am reminded, too, of 
certain curious gravels I have described on the highest 
fTarts ot the Dividing Range near Stanthorne. T rlA ,,r.t 
beds we may say : — 
To summari.se the proofs of the relative age of these 
LUtJIU LO lie 
erosion of the Ipswich beds. 
1V.I. KiLx: KiiuiJb jiKC iringing 
upon an old surface of 
