90 GEOI.OGY OF LOWER MESOZOIC ROCKS OF QUEENSLAND, 



Araucarites sp.B, (SPalissT/a australis. 



ftConites sp. ftChelrolepis (1) setosiis. 



cf. Brachyphyllum sp fi cf. Albertia austi'alis. 



ftB. yippslandicum. CarpoJithes sp.A. 



aVaxites sp. Carpolithes sp.B. 



The species marked /i are recorded by Chapman, in addition 

 to those described by Seward. 



Of the species in this list, those marked with a (10 in 

 number) are similar to types occurring in the Lower Oolite 

 of England. 



In the Victorian Lower Mesozoic rocks, a tooth and scales of 

 Geratodus have been found, and also a claw of a dinosaur. One 

 species of Unio {U. stirlinyi) occurs in these beds. 



Although the number of species of plants common to the Vic- 

 torian and Queensland Lower Mesozoic rocks is small, there is 

 no doubt that the Victorian flora resembles the Walloon flora 

 much more than it does the Ipswich flora. A few species, e.y., 

 I'ceniopteris Daintreei { = 1\ spaiulata), T, Daintreei var. viajor, 

 and Cladophlehis deiiticnlata var. a^Lstralis ( = C. australis) are 

 identical with forms of the Walloon Series; while others, as 

 Sphenopteris ampla, Baiera yracilis, cf. Brachyphyllum sp., and 

 Taxites sp., are closely allied to forms found in the Walloon 

 Seiies. The occurrence of Tceuiopferis spatiilata and the conifers, 

 Araucarites, Brachyphyllum, and Taxites is sufficient to show 

 clearly, that this flora is not to be compared with that of the 

 Ipswich Series. There appears to be no doubt that the Victorian 

 Mesozoic Coal-Measures are to be correlated with the Walloon 

 Series in Queensland, and its equivalents in ISew-South Wales. 



(c) South Australia. — In South Australia, the strata of Lower 

 Mesozoic Age comprise the south-western margin of the Great 

 Australian Artesian Basin, and an outlier of this preserved as a 

 faulted basin in the neighbourhood of Leigh's Creek. The 

 Leigh's Creek basin is quite isolated, and surrounded by rocks 

 of Upper Cambrian Age; the basin is 16 miles long, and has a 

 maximum breadth of 6 miles; the total thickness of strata in it 

 exceeds 2,000 feet of shales and carbonaceous shale, with bands 

 of limestone and sandstone, and a belt of very hydrous coal, 48 

 feet thick. 



