BY H. C. RICHARDS. 129 



-sions passing: from the Palaeozoic schists to the Mesozoic 

 sediments, but on the other hand they stop at the junction. 



One can thus easily account i'or the presence of these 

 pebbles, and it is clear that there need be no relationship 

 at all between these waterworn pebbles and the volcanic 

 rocks which are found resting on the Walloon sediments, 

 and in fact the evidence is against it. The author knows 

 of no basalt pebbles, although melanocratic porphyritic 

 rocks which have some resemblance to porphyritic basalt 

 are sometimes met with, but these also occur as pre-Trias- 

 Jura hypabyssal material. 



(2 ) The piece of "volcanic tuff" containing fossil 

 plant-remains such as Tceiiiopteris daintreei was about 3 

 or 4 cubic feet in volume, and was found by Messrs. Wearne 

 and Zerner. They also found another smaller piece. The 

 author investigated this locality with ]\Ir. Zerner, and 

 although the same track was traversed to the top of the 

 range, and diligent search made, no further traces of 

 "volcanic tuif" were found, but on the other hand many 

 small boulders of sandstone and quartzite were met with. 

 This particular range is made up of quartzites, sandstones, 

 conglomerates and shales, to a height of 1,500 feet above 

 sea-level, and it is capped by about 600 feet of olivine 

 bds.-dr. .^tessrs. Wearne and Zerner found their plant- 

 bearing fragments at heights 1,350 feet and 1,700 feet 

 respectively. 



Between the heights of 1,150 feet and 1,750 feet 

 nothing other than basalt is met, except the occasional 

 sandstone and quartzite boulders lying on the surface. In 

 many other areas one finds these xenoliths included in the 

 basic flows, and it is most probable that these quartzite and 

 sandstone boulders which are indistinguishable from the 

 underlying quartzites and sandstones have been cavight up 

 by the basalt, also that the "volcanic tuff," which to the 

 ■author seems a light-coloured shale, simply represents 

 imderlying Mesozoic sedimentary material caught up in 

 the basalt and brought along with it. There is no develop- 

 ment at all of trachytic rocks in this district, and this has 

 been pointed out by Wearne in his report to the Melbourne 

 meeting of the A.A.A.S. in 1913. 



