754 E. C. ANDREWS 



Origin and scope of present note. — The idea of writing a paper 

 similar to the present one was conceived as far back as 1905-6, 

 when the writer was surveying an area of folded sediments in 

 Northern New South Wales. Previous workers had considered these 

 beds as belonging to the older Paleozoic because they were strongly 

 folded, whereas the beds of known Permo-Carboniferous type in 

 Australia at that time were either horizontally bedded or only 

 moderately domed. 



David, however, in connection with these beds, had pointed out 

 as far back as 1893 : " I have, however, lately come to the conclusion 

 that the whole of the Paleozoic sedimentary rocks of the Vegetable 

 Creek district, provisionally classed by me as Upper Silurian or 

 Devonian, are referable to the Gympie horizon" 1 [presumably 

 Carboniferous. — E. C. A.]. 



During the progress of the survey these beds were discovered to 

 contain many characteristic Lower Marine (Permo-Carboniferous) 

 fossils, as probably also some Upper Marine types. The area of 

 these Permo-Carboniferous types was proved to extend far to the 

 north and west afterward by the field work of Carne and the 

 writer. 2 



In Southern Queensland, near Warwick, these two observers 

 found Lower Marine rocks folded in the most complicated manner, 3 

 while in 1908 during a visit to Mount Morgan, about 500 miles north 

 of the New South Wales border, they saw rocks indicated on the 

 Queensland geological map 4 as of the same age as the Warwick 

 types, also highly folded. 



In 1901 Mr. C. Hedley and the writer traced rocks at intervals 

 from a little north of Townsville to near Cooktown, all highly con- 

 torted, and all shown on the Queensland geological map as of the 

 same age as the Warwick beds. This caused the writer to consider 



1 "Presidential Address," Proc. Linn. Soc. N.S. Wales, 1893, pp. 586-87. 



3 J. E. Came, "The Tin-Mining Industry of Xew South Wales," Mineral Resources 

 No. 14, Dept. Mines, Sydney, N.S.W., ion, pp. 54, 70, 71; E. C. Andrews, "The Drake 

 Copper and Gold Field, N.S. Wales," Mineral Resources No. 12, Dept. Mines, Sydney, 

 N.S.W., 1908, pp. 3-1 1. 



3 Drake Report. See plate opposite p. 10. 



4 R. L. Jack and R. Etheridge, Geology of Queensland, Brisbane (by Authority), 

 1892, plate 69. 



