128 Transactions of the Royal Society of Victoria. 



spaces which at one time were filled by sediments, but that 

 their action has not at all times been one of forcible intrusion, 

 for at Hinnomunjie the schists are cut off, but not contorted. 

 At Wilson's Creek, however, their action seems to have 

 been accompanied by more violence and also with greater 

 metamorphic efiect, and this may have been due to there 

 having been at that place stronger plutonic activity. For 

 at rather over a mile in a south-west direction from the 

 contact at Wilson's Creek, there is situated a rocky hill, 

 known locally as the Frenchman's Hill, which marks the 

 site of a considerable eruption of igneous rocks younger 

 than the granites, but I believe connected with them. To 

 this younger plutonic magma I attribute the metamorphic 

 action which I observe in some of the granites, and perhaps, 

 also the "finishing touches" in the schists nearest to it. 

 As the granites and the granite dykes penetrated the schists 

 and metamorphosed them, so did the quartz-bearing and 

 quartzless porphyries of the Frenchman's Hill, penetrate in 

 masses and in dykes, both the granites and the schists, and 

 re-act upon them. 



It remains to remark upon the gneisses which, in some 

 places, as for instance at the junction of Wilson's Creek, and 

 in a gully on the western side of Livingstone Creek, and 

 nearly opposite Day's Creek, form part of the granitic rocks. 

 These gneisses are in fact merely structural forms of the 

 granites, and are strictly analogous to the gneisses, which in 

 the Swift's Creek area and elsewhere, are often the margins 

 of the intrusive masses. They probably result from 

 pressure upon the consolidating magmas, and it is between 

 gneisses of this class and the plutonic masses that a complete 

 passage can be traced. Where, however, such gneissose forms 

 of the intrusive rocks occur near to contacts with the 

 regional schists in the Omeo district, there appears, unless 

 under most favourable surface conditions, and with the most 

 careful inspection, to be a continuous sequence from the 

 granitic rocks to gneiss, and from gneiss to mica schist, and 

 finally through less altered rocks to the normal lower 

 palaeozoic sediments. It is evident that under such 

 conditions, it is only in places where the streams have laid 

 bare a series of such rocks, that the break between the 

 schistose forms of the io-neous rocks and the schistose 

 forms of the metamorphosed sediments can be seen 

 and recognised. Examinations elsewhere in places where 

 the actual sequence of the rock formations is obscured by 



