446 PEOCEEDIKGS OF THE GEOLOGICAL SOCTETY. [Apr. 11, 



present the Reedy-Creek seam ; but as it is 300 feet or so above that 

 level, it would rather belong to the coal-seam at the height of 3000 

 feet on Mount York. A further discovery of Cannel, but not so rich 

 as the original, has been made south of the foot of Mount Yictoria, 

 in two spots where the Cannel proved to be from 15 to 18 inches and 

 21 inches thick respectively. It is, so far as is at present known, 

 quite clear that these seams are in patches, and not of uniform thick- 

 ness ; and consequently it would be premature to build expectations 

 of any kind as to the extent in space occupied by them. 



9. Colo and Grose Rivers. — The existence of Cannel of the Reedy- 

 Creek kind is not altogether confined to the western side of the pla- 

 teau ; for in the Colo River and in the Grose also, and in the Burralow 

 Creek, which flows to the latter from the Xurrajong, rounded pebbles 

 of Brown Cannel have been found, as I learn from my field-notes 

 made many years ago, and from specimens more recently collected. 



Both the Colo and Grose flow through gorges and ravines like 

 those of the Nattai and WoUondilly, but not so accessible as the 

 latter. As there are considerable deposits of coal about Wolgan, 

 Capertu, and Cherry-tree Hill, where there is a seam 10 feet thick, 

 it is not improbable that the Colo -drift Cannel may have come down 

 from the higher parts of the river. 



In the places mentioned above, the same genera and species of 

 plants which occur in the Coal-measures of the Nattai and WoUon- 

 dilly are also found; and these same fossils are abundant in the 

 shales at the head of the Tui^on, and also at the head of the Cox, 

 and under Hassan's Walls and Mount Clarence ; so that the Upper 

 Coal-measures are everywhere distinguished in the area under review. 



It is quite clear, therefore, that the Oil-hearing shales and Can- 

 nels are, in the eastern Coal-Jield of New South Wales, entirely con- 

 fined to the upper group. 



10. Turon Drift. — About Bowerfells, and at Brucedale, on the 

 Winbumdale rivulet (near Bathurst), there is a drift of another kind 

 from that of the rivers over the Wianamatta beds. It consists of frag- 

 ments,much rounded, of yellow sandstone, full of Spirifera, Orthis,&e. 

 It was not until very recently that I ascertained the source of these 

 fragments. Some distance below the head of the Turon River there 

 is a place called the Gun, which is surrounded by ranges fully 1000 

 feet high ; the bottom of the gulf is formed of slates, from which 

 the gold of Sofala has been derived ; and over them occurs a ferru- 

 ginous conglomerate, which is succeeded by thick beds of the Bra- 

 chiopod-sandstone, over which come in conglomerates, shales, sand- 

 stones, and the coal of Cherry-tree Hill, surmounted by the Hawkes- 

 bury rocks. In the drift of the Turon, about Sofala, occur blocks 

 of hardened sandstone impressed with Lepidodendron. 



In like manner the Brachiopod-bearing sandstone is strewn 

 about in the river-drift of the Moruya to the southward, from 

 which it is to be inferred that the whole of the groups connected 

 with the Carboniferous formation have been broken up and dis- 

 persed. Where, however, the Hawkesbury rocks cover them, the 

 Upper Coal-measures are in some degree protected. 



The success which appears to have attended the working of the 



