226 GREAT SERPENTINE-BELT OF NEW SOUTH WALES, vi., 



unconformity between these sandstones and the underlying Car- 

 boniferous rocks. He also described and mapped the neighbour- 

 liood of Crow Mountain, and obtained, both there and at Bu- 

 rindi, a further series of Carboniferous marine fossils. He con- 

 cluded that the intrusion of serpentine at Crow Mountain was 

 probably of Carboniferous age(2l). He also discovered a series 

 of Jurassic leaf -fossils in the sandstones of Warialda(22). 



Professor Judd described specimens of massive garnet-rock and 

 picotite-rock obtained from Barrack Creek (24), the former pro- 

 bably analogous to a garnet-rock described, with other minerals 

 from the Bingara district, by Mr. D. A. Porter (25), which the 

 present writer has shown to be a highly altered gabbro(l, iii.). 

 Rev. J. Milne Curran described the garnetiferous basalt from 

 Ruby Hill near Bingara (26), which locality w^as later studied in 

 detail by Mr. Pittman in 1900; and the petrology of the remark- 

 able series of eclogites and breccias he obtained there, was de- 

 scribed by Mr. Card (28). The diatomaceous earth of Barraba 

 was studied microscopically by Messrs. Card and Dun, who found 

 Melosira and SpoiujiUa to be present (29). Mr. Carne briefly 

 described the geology of Gulf Creek and adjacent cupriferous 

 areas in 1899, and again in 1908(30). 



Mr. Andrews discussed the physiography of the whole region 

 in 1903(32), and outlined the sequence of plutonic intrusions in 

 New England in 1905(33). He briefly described the limestones 

 of Bobby Whitlow and Warialda in 1908(34). Dr. Jensen, in 

 1907, gave an account of the Nandewar Mountains, with full 

 petrological detail, and a geological map and section embracing 

 the western pijrtion of the area here considered (31). Mr. Harper, 

 in 1909, traced the Mesozoic sandstone around the foot of the 

 Nandewar Ranges; and Mr. Carne collected a series of Carbon- 

 iferous marine fossils near Gravesend, which were determined by 

 Mr. Dun(36). In 1909, 1910, and 1913, Mr. Cotton studied the 

 region around the junction of Cope's Creek with the Gwydir 

 River (35). 



The present writer's observations were made in 1911: a general 

 statement of the stratigraphical succession, and a geological map 



