582 GREAT SERPENTINE-BELT OF NEW SOUTH WALES, V., 



Westwards from the pericline, the series continues with a south- 

 westerly dip and decreasing- inclination. There are probably one 

 or more faults running to the west of the Igneous Zone, causing 

 repetition of it. Again, there are the faults in the Tamworth 

 Common, at Cleary's Hill, and at Spring Gully, which seem to 

 extend to Moore Creek. These have a roughly meridional direc- 

 tion. The strata, however, do not follow this direction, but swing 

 round to the north of the Tamworth Common, till they are dipping 

 due south. This bend possibly represents the edge of another 

 syncline with a N.E.-S.W. axis, of which the south-western limb 

 has been cut off by the fault in Spring Creek valley. The strata to 

 the west of this fault are flattened out, and are bent into a syncline, 

 which can be traced northwards to Moore Creek, and southwards 

 across the Peel River. Its axis runs in a direction trending N.N.W. 

 to S.S.E. 



Recognisable zones, wherever they have been found, are seen to 

 have been repeated by faulting, and it is safe to assume that more 

 strike-faulting must be present undiscovered in the monotonous 

 series of mudstones and tuffs in the Upper Middle Devonian, and 

 the Upper Devonian Series. The rarity of faults in the sections 

 exposed in the railway-cuttings should, however, warn one against 

 over-estimating this feature. 



In addition to these roughly meridional faults, there are others 

 which are more nearly parallel to the axis of the Cockburn River 

 (and Tamworth Common ?) syncline. Thus there are two direc- 

 tions of folding and faulting in the district, with some lines follow- 

 ing an intermediate direction. The question as to the relative age 

 of the two at once arises. There is not yet, however, sufficient 

 evidence to show the nature of the thrusts and movements that 

 have brought about this reticulation of tectonic lines. In adjacent 

 districts now under investigation, a different intersection of tee- 

 tonic lines is observable, and, until more is known of these areas, a 

 discussion of the tectonics of the region would be premature. 

 Thickness of the Devonian jSeries. 



The facts recorded in the foregoing paragraphs show that the 

 attempt to find definite continuous horizons, from which the tec- 



