84 GEOLOGY OF LOWER MESOZOIC ROCKS OF QUEENSLAND, 



Downs, and they must, therefore, be identified with one another 

 as regards age, on the evidence of their field-occurrence alone. 



Lithologically, the Clarence Series is divisible into three divi 

 sions, the middle one consisting of a series of massive sandstones. 

 This lithological division led to a consideration of the possibility 

 of the three stages being the equivalents of the Narrabeen, 

 Havvkesbury Sandstone, and Wianamatta Stages of the Hawkes- 

 bury Series. Mr. Carne* has, however, shown, in a convincing 

 manner, that this is not the case. 



Another possibility that must be considered is, that the three 

 stages of the Clarence Series might be the equivalents of the 

 Ipswich, Bundamba, and Walloon Series of Queensland. Un- 

 fortunately, the Clarence Series has not been examined in great 

 detail geologically, but the fact, that Carne indicates the presence 

 of 'Tcenioptey^is spatulata \T. Daintreei] in the lower part of the 

 Series,! is sufficient to render the correlation of any part of the 

 Clarence Series with the Ipswich Series improbable. It is pos- 

 sible that the sandstones and conglomerates at the base of the 

 Clarence Series may be the equivalents of the Bundamba, but, 

 on the present evidence, I believe that the greater part of the 

 Clarence Series (if not all of it) is to be correlated with the 

 Walloon Series of Queensland. 



Fossil plants are present in varying abundance in the various 

 Lower Mesozoic Series of New South Wales. No thorough 

 examination of the flora of the three Stages has been undertaken, 

 and, therefore, the compilation of satisfactory lists of the floras 

 of the different Series is not an easy matter. The following lists 

 have been drawn up from descriptions and lists published from 

 time to time, the majority of the determinations of New South 

 Whales Mesozoic plants having been made by Messrs. R. Ether- 

 idge Junr., and W. S. Dun. Names included in square brackets in 

 these lists are concjusious or comparisons suggested by myself to 

 bring, where possible, the New South Wales determinations into 

 line with my own work on the Queensland flora. 



* Carne, Mem. Geol. Surv. N.S. Wales, Geology, No. 6, 1908, pp.31-4n. 

 t Carne, op. cit., p. 34. 



