52 COALFIELDS AND COLLIHKIIOS OK AUSTRALIA. 



tonic rocks. The geological age of these seams is a matter 

 of doubt; they are probably equivalents of the Lower Fresh- 

 water series of the Lower Bow T eii Formation, which are Permo- 

 Carboniferous. 



The Burruni coal basin belongs to the Lower Trias-Jura, 

 The principal seams are the Bridge seam: about 220ft. lower is 

 the Laphain or Torbanlea (Beaufort?) seam, from about 2ft. 

 thick with 4in. band to 6ft. 2in. with a 1ft. 3in. band; some 

 35 to 40ft. lower is theBurruni seam, about 3ft. Tin. thick, also 

 with a band of varying thickness : 113ft. loAver is the New or 

 Jewel seam, which is 2ft. 6in of dirty coal; 95ft. below this is- 

 the AVatson seam, 4ft. thick; 270ft.' lower the North Hartley 

 seam, 4ft. 2in. ; and about 200ft. deeper, the Bleiiesk seam, 

 1ft. Gin. to 2ft. thick. All these seams have not been worked, 

 and some have been worked and abandoned ; while others, 

 again, are good in some places but too small or dirty in 

 others. The Torbanlea seam is harder and better coal, especi- 

 ally for gas making purposes, than the Burrum seam. The 

 seams on the northern side of the Burrum Eiver appear to 

 be more disturbed than those on the southern side, and they 

 are subject to several small faults. According to E. L. Jack 

 and E. Etheridge, jun.t: "This coal field extends along the 

 eastern coast line from Point Cartwright on the south at least 

 to Littabella Creek on the north, and stretches inland for an 

 average distance of 25 miles. Its area may be roughly esti- 

 mated at 3000 square miles." 



The following are analysis of coals from the Burrum Coal 

 Field, given by W. H. Eands+ : 



Name of S'eam. 



Queensland Collieries' 

 Co.'s Seam 2.54 



Laphain or Torbanlea 

 Seam (Torbanlea 

 Colliery) bottom 

 coal 2.0 



Ditto, top coal 



Burrum Seam (Tor- 

 banlea CollMM-v) ., 2.75 



28.0 

 29.15 



28.00 



= 

 30.35 64.30 



2.50 0.35 

 (grey) 



1.24 66.80' 



61.60 8.00 0.40 



(grey) 

 66.50 2.10 



(grey) 



1.31 

 1.26 



65.55 3.25 



(reddish) 



0.45 1.2', 



69.60' 

 68.60 



68.60 



tGeology of Queensland and New Guinea, p. 300 (Bris- 

 bane) . 



JThe Burrum Coal Field (By Authority, Brisbane, 1886.) 



