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



rock, which is often associated with the limestone, is doubtless 

 that indicated in Stutchbury's statement, that the limestone 

 becomes metamorphosed and passes into "imperfect serpentine" 

 (6). What is probably the continuation of this limestone occurs 

 at a small bluff at the northern end of the sharp S-bend on the 

 Horton River, north of Pallal, which was twice visited by 

 Stutchbury, who obtained an extensive fauna therefrom (1, Pt. 

 i., pp. 505-507). This is clearly comparable with the Burindi 

 fauna. Though L. australe does not occur in this fossiliferous 

 zone, it is present immediately to the east of it, e.g., at the mouth 

 of Pallal Creek. East of this, we pass into typical Barraba 

 rocks, which continue with increasingly steep westerly dip up 

 the spurs of the Bingara Range, which are capped by basalt. 

 About a mile north-east of Pallal homestead is another patch of 

 basalt, at the top of a small hill, 300 feet above the river, but 

 1,000 feet below the base of the basalt of the Bingara Range 

 only two miles away. This seems to be a volcanic neck. 



The ridge west of the river contains the base of the Rocky 

 Creek syncline. The dip of the conglomerate gradually changes 

 to the east, and Burindi rocks appear again before the summit 

 is reached. This feature probably accounts for the peculiar 

 courses of the creeks draining the slope. At Derra Gap, on the 

 summit of the range (called Darragh Gap by Stutchbury), this 

 geologist noted the presence of sandstones with a seam of coal 

 2 feet 6 inches thick, the upper sandstone being replete with 

 vegetable remains (6). Stonier (19) remarks of this spot, that 

 sandstone and conglomerate lie in apparent unconformity on the 

 Carboniferous rocks. 



West of the river, and seven miles north of Pallal, the rocks 

 are tuffaceous conglomerates, in which obscure plant-remains 

 were obtained by Stonier, which Etheridge referred to Rha- 

 copteris{1). This occurrence appeared to the writer to be merely 

 the western limb of the faulted continuation of the Rocky Creek 

 Syncline. Up the hill to the west, Burindi rocks appear below 

 the conglomerates. To the east, near the river, these conglom- 

 erates are again cut out by a fault, which brings up the Burindi 

 rocks. Further west, at the top of the Slaughterhouse Range, 



