1872.] DAINTEEE — GEOLOGY OP QUEENSLAND. 285 



Fliuders, a spring of hot water rises above the surface of the plain ; 

 and its overflow deposits a white incrustation, which on analysis by 

 Dr. Flight, under the direction of Professor Maskelyne, afforded : 



Water 27793 



Silica 0-600 



Chlorine 3-369 



Sodium 2-183 



Carbonic acid 33*735 



Soda 31-690 



99-370 



The sulphuric acid, of which there was a small portion, was un- 

 determined. 



Apart, therefore, from the 5-552 per cent, of chloride of sodium, 

 the deposit consists of sesquicarbonate of soda, or native " Trona," 

 and as such it is used by the settlers for culinary purposes, &c. 



The importance of this evidence as to the probability of finding- 

 Artesian supplies of water in districts where such springs are met 

 with, should not be lost sight of; and a bore put down in the vici- 

 nity of one of them (for this is not the only one) might, if successful 

 in obtaining water, lead to most important practical results. 



Paljeozoic. 



Carhoniferous. — Whilst the affinities of the southern coal-field of 

 Queensland are Mesozoic, a northern field, of even larger extent, has 

 a distinct fauna more resembling the Palaeozoic Carboniferous of 

 Europe. 



In the upper portion of the series the organic remains are chiefly 

 confined to plants, the most abundant of which is Glossopteris, im- 

 bedded with less numerous specimens of Pecopteris, Sphenopteris, ifec. 



In the lower strata, Producti, Spirifero}, &c., of true Carboniferous 

 age, are found associated with the above flora, though the plants are 

 very sparingly reiDresented, and in very imperfect forms. 



The Dawson, Comet, M'Kenzie, Isaacs and Bowen rivers drain 

 this Carboniferous area ; and numerous outcrops of coal have been 

 observed on these streams. No commercial use, however, has yet 

 been made of any of them, as the measures generally are too far 

 inland to be made available until the railway-system of the country 

 is extended in that direction. 



Messrs. K. Etheridge, E.R.S., and W. Carruthers, F.E.S., have 

 examined and named, the one the moUusca &c., the other the plants, 

 from different localities over this large area. 



The former describes, from Cracow Creek on the Dawson river : — 



Chonetes cracowensis, Eih. PI. XVIII. fig. 2. 

 Pleurotomaria (?) PI. XVIII. fig. 3. 



From Weelwondongara Creek, Nogoa Hiver : — 



Productus or Slrophalosia. 

 Streptorhj'nchus 



