Parslow's Plains, there are signs o£ silicification and induration 

 with nnmerous felsitic dykes, indicating an intrusive granite ; 

 but on the western side towards Mount Parslow, the granitic 

 rock masses appear to pass upward into coarse gneiss and mica 

 schists — the gneissic rocks forming the principal mass in the 

 bed of the Victoria Eiver. From the Victoria Eiver to the 

 crest of the Main Dividing Eange the rocks are principally 

 metamorphic, veined with white quartz and intersected by 

 dioritic and felsitic dykes ; but in descending towards the 

 Dargo Eiver the gradual passage from gneissose rocks to mica 

 schist, thence to micaceous shales and the unaltered Silurian 

 slates and sandstones is plainly seen. On King's Spur there is 

 also a leptynite schist containing decomposed garnets, and a 

 band of rock composed of quartz and green hornblende.* 



Ascending what is known as Mayford Spur on the west side 

 of the Dargo Eiver, the slates and sandstones are continuous 

 for about 1,400 feet above the level of that river, where they 

 are seen to be overlain by deposits of heavy auriferous gravels, 

 with bands of foliated sand}^ clay containing impressions of 

 the Miocene plant Cinnamominnpolj/morplioicles, McCoy. In this 

 locality at similar levels are masses of silicious conglomerates 

 and ferruginous bands containing imperfect Lauraceous leaves 

 and Salishuria Murraya^ McCoy, nearly allied to some Miocene 

 forms from the arctic regions. f These Miocene deposits are 

 overlain by extensive sheets of basalt, forming the Dargo High 

 Plains at elevations of from 4,000 to 5,000 feet above sea 

 level. As this section traverses an extent of territory not yet 

 examined by the Geological Survey of Victoria, it may be 

 interesting to conclude with an outline of the probable strati- 

 graphical relations of the different rock masses. 



SlLI'EIAX. 



There does not appear to be any remnants of Pre-Silurian or 

 Archaean rocks within the area ; it is not improbable, however, 

 that the PalcTOzoic volcanic and plutonic activities have com- 

 pletely transmuted any such Archaean sediments into the 

 granitic masses, now laid bare by denudation within the Lower 

 Silurian areas. The great mass of metamorphic schists, &c., 

 would appear to be simply the metamorphosed Lower Silurian 

 sediments, although there are not wanting evidences that the 

 L'pper Silurian rocks have been tilted, folded, and compressed 

 along with the Lower Silurian, and, like them, subjected to 

 the influence of metamorphic action. Mr. Selwyn remarks J 



* " Progress Eeport Geol. Surv., Victoria, 1878," p. 98. 

 t " Progress Report Geol. Surv., Victoria," vol. 5. 

 1 " Intercolonial Exhibition Essays." 



