168 PROCEEDINGS OP THE ROYAL SOCIETY OF QUEENSLAND. 



Note on the Walloon Jurassic Flora. 



By J. H. Reii). 

 {Bead before ihc Eoyal Society of Queensland, Z\st August, 1922.) 



Until the past two years very little geological work 

 had been devoted to the Walloon formation in Southern 

 Queensland, and although fossil plants are abundant 

 therein, the lack of systematic collecting and of strati- 

 graphical data has been a serious drawback to previous 

 palieontological work. The Flora of the Ipswich and 

 Walloon Series has been described by Dr. Walkom on all 

 the local material available up to 1916.^ Since then, as 

 the result of field work by officers of the Geological Survey, 

 extended collecting has been possible and the material 

 available is now much more complete. 



This work comprises a reconnaissance survey of the 

 Roma District by Dr. H. I. Jensen- ; also a detailed survey 

 of the Rosewood Coalfield^ and a reconnaissance survey of 

 the West Moreton district by the writer (in Press). No 

 detailed work has been done in the Darling Downs area, 

 but the omission is probably not important, since the beds 

 there are undoubtedly continuous with the Moreton beds 

 under a narrow strip of basalt along the Toowoomba Range, 

 and the northern portion of the Downs is probably on the 

 same stratigrapbical horizon as some of those examined iii 

 the Moreton district. It is tolerably certain that the 

 Walloon formation extends unbroken between Beaudesert 

 and Roma districts, covered in places by more recent 

 deposits. Certain important paUyontologieal conclusions 

 present themselves as a result of this work, which were not 

 so obvious previously, and which connote marked differences 

 between the Ipswich Flora and that of the Walloon, other 

 than those noted by Walkom. 



The predominant species of the Ipswich formation are 

 the various species of TMnnf eldia, and the following are 



'"Mesozoic Floras of Queensland," Pt. I. Q.G.S.P. 252 (1915), 

 257 and 259 (1919). 



- Summary of report published in Queensland Government Mining 

 Journal, March, 1921. 



' Geology of Walloon-Eosewood Coalfield, ihid, June-September, 

 1921. 



