18 Proceedings of the Royal Society of Victoria. 



as it wa.s thought to resemble tlje other plant beds of the colony 

 which are ascribed to that age. Now these plant beds at 

 Flemington, Berwick, Dargo High Plains and other places* 

 where they are associated with the Older Volcanic rock, underlie 

 it. However there are certainly good grounds for doubting the 

 age ascribed to the volcanic rock. At Flinders, a small patch of 

 polyzoal rock lies on the deeply eroded surface of the igneous 

 series. The limestone being crowded with foraminifera sucli as 

 Amphistegina (very common) Operculina and Orbitoides shows 

 an approach in character to the Orbitoides limestone which we 

 showed! lay at the base of the Moorabool Valley be Is. At 

 Kagle's Nest, near Airey's Iidet, the so called mio^ene also, as 

 shown by tl e sections of the Survey, overlies the volcanic rock. 

 Palaiontological evidence is gradually accumulating to show that 

 the ferruginous beds of Royal Park, near Melbourne, also belong 

 to the eocene series, and these be.ls, as the cutting, for instance, in 

 the park shows, lie also on the deeply eroded surface of the 

 volcanic rock. Here at Curlewis, we show the same sequence. 

 Selwynj says that "the products of both volcanic periods are 

 often contemporaneous, and interstratitied, with the marine 

 limestones." The only specific instances we can find quoted of 

 this intei'calation, in reference to the Older Volcanic, are the 

 Maude sections on the Moorabool River, and Sutherland's Creek. 

 As a rule then, there has been a considerable lapse of time 

 between the volcanic flows and the deposition of the marine 

 eocene beds. Should the Survey reading of the Maude section 

 prove the correct one, some subdivision of the Older Volcanic 

 series will be required, as a rock, the surface of which is deeply 

 eroded before being covered with a marine deposit, can hardly be 

 ascribed to the same age as a sheet intercalated with the latter. 

 That the officers of the Survey have felt the need of some such 

 division is shown by the legend attached to the older volcanic 

 rock of the Bellarine Hills {\ sheets 23 N.E. a«d 23 S.E.) 

 namely 'miocene or older.' That it certainly is older is shown 

 by the fact that the clays which are marked as miocene on the 

 map, but which were subsequently stated by Prof. McCoy to be 

 01igocene,§ distinctly overlie it. The lower tertiary beds of this 



» Murray, Geol. and Pliys. Geog. of Vict., p. 1U4, et sog. 



t Proc. Uoy. Soc. Vict., vol. iv., N.S., p. 11. 



% Exliib. Essays, 1806, p. 31. § Prod. Pal. Vic, Doc. iv., p. 2G. 



