82 GEOLOGY OF LOAYER MESOZOIC ROCKS OF QUEENSLAND, 



From the evidence available, M'e are justified in stating that 

 the flora of the Ipswich Series indicates distinctly an Upper 

 Triassic age, possibly Rhsetic, but probably older. 



The flora of the Walloon Series is decidedly of a Jurassic type, 

 and the typical Jurassic forms in the Series seem to consist of 

 about equal numbers of species characteristic of Liassic and 

 Lower Oolitic strata. The Walloon Series is of very great thick- 

 ness (probably of the order of 10,000 feet), and when it has been 

 studied in greater detail, it seems quite probable that it may 

 have to be subdivided into a number of stages. For the present, 

 we may regard the Walloon Series as representing a portion of 

 the Lower Jurassic System corresponding at least to the Lias 

 and Lower Oolite. 



It is very diflicult to draw any reliable conclusion as to whether 

 the Bundamba Series should be placed with the Ipswich Series 

 in the 'I'riassic, or with the Walloon Series in the Jurassic. 



There is no fossil evidence which may be taken as a guide. 

 Both Mr. Cameron and Mr. Dunstan have drawn my attention 

 to the usual association of the Bundamba Series with the Ipswich 

 Series, rather than with the Walloon Series; and, on this account, 

 it is, for the present, tentatively placed in the Triassic System 

 with the Ipswich Series. 



Correlation of the Lower Mesozoic Rocks of Queensland 



WITH those of other AREAS IN AUSTRALIA. 



In considering the correlation of the Queensland Lower Meso- 

 zoic rocks with those of the other States, their relations with the 

 States will be discussed separately in the first place, and then 

 the results summarised by drawing up a table indicating the 

 relative positions of the various occurrences. 



(a) New South Wales. — In New South Wales, the strata of 

 Lower Mesozoic age comprise (a) the Hawkesbury Series, includ- 

 ing the Narrabeen Stage, Hawkesbury Sandstone Stage, and 

 Wianamatta Stage, to which a Triassic age has generally been 

 assigned; (b) the Talbragar Beds, the Clarence Series, and the 

 Artesian Series, which have been regarded as of Trias-Jura age. 



