1254 C. A. SUSSMILCH AND T. W. E. DAVID. 



plete section of these beds cannot be given. Further to 

 the north, notably in the Gloucester District, junctions 

 ■between the Devonian and Carboniferous Systems occur ; 

 the field work in this northern area is, however, not yet 

 complete, and final results are therefore not available* 

 Sufficient work has been done however to indicate a thick- 

 ness of at least 5000 feet for the Lower Carboniferous and 

 about 7000 feet for the Middle and Upper Carboniferous in 

 this region. 



No angular unconformity exists, so far as the writer's 

 observations have gone, between the Burindi Series and the 

 Kuttung Series, but the change from one to the other is 

 marked by (1) a change from marine to terrestrial con- 

 ditions of sedimentation (2) a complete palseontological 

 break (3) the presence of an extraordinarily thick bed of 

 conglomerate (the Wallarobba Conglomerate) at the base 

 of the Kuttung series. 



A. The Burindi Series. 



The Lower Carboniferous or Burindi Series. — As has 

 already been pointed out a complete section of these strata 

 has not been found in this district; a satisfactory sub- 

 division of this series is further hindered by the extensive 

 strike faulting to which they have been subjected, which 

 has given much repetition of the strata, and in some places 

 so mixed them up with the Kuttung Series that very care- 

 ful detailed mapping of large areas will be necessary before 

 a detailed section will be possible. The section given in 

 PI. XIX is only an approximation and is only given for the 

 purpose of indicating the approximate thickness of the 

 series as a whole, the details are not to scale. 



These strata outcrop extensively around the town of 

 Dungog, and excellent sections may be seen in the road and 

 railway cuttings going east from that township; they also 

 outcrop extensively around the village of Hilldale and 



