570 GREAT SERPENTINE BELT OF NEW SOUTH WALES, ti., 



separated by the line of peridotite-intrusions from the Bowling 

 Alley Series. The latter passes directly upwards into the Nundle 

 Series without any unconformity. It has been shown (see Part i.) 

 that these three Series exist throughout the whole belt as far as 

 Warialda, that the Bowling Alley belts are the local equivalent 

 of the Tarn worth Series, that the Nundle Series corresponds to 

 the Barraba Series, and that reasons may be offered for the 

 absence of the Baldwin Agglomerates. The higher Burindi 

 Series does not appear till one reaches Goonoo Goonoo, 20 miles 

 to the west. 



We now proceed to a detailed description of the several forma- 

 tions, as developed in this area. 



(1). Woolomin Series. 



The eastern portion of the area is made up of rocks of the 

 Woolomin Series. Their western boundary is the line of fault, 

 which is marked throughout by the serpentine-intrusions. The 

 series is made up of jaspers, phyllites, spilite-lavas, and tuffs, 

 with occasionally conglomerates. The jaspers are the most 

 striking rocks, and are developed in long bands not quite parallel 

 to the serpentine-line. Commencing in the rugged cliffs of 

 Wallaby Mountain, west of Woolomin, they may be followed across 

 the Peel River; they form the Peak by Warden's Farm, and the 

 high rocks overlooking Sheep Station Creek; and then continue 

 along the line of watershed between Munro's and Duncan's 

 Creeks, and finally are cut out by the granodiorite. A line of 

 section from Warden's Farm, on the Peel River, across to 

 Duncan's Creek, shows nine bands of jasper, varying in width up 

 to 100 feet, and invariably giving marked relief. They are not 

 banded but homogeneous, pale pink to deep red in colour, and 

 with traces of radiolaria, which are rarely visible distinctly in 

 microscopic section. They are often intensely silicified, riddled 

 with twisting quartz-veins, small or reaching some yards in width, 

 and, in one instance, the jasper-band is entirely replaced by a 

 huge white quartz-reef, over 100 yards long, and 8 or 10 yards 

 wide, that stands out, like a wall, from the eastward-facing cliffs 

 beyond the head of Munro's Creek, and is protecting the upper 



