toseanite, all aggregated together in a gritty matrix which contains patches of 

 varve-like material. The absence of bands of contiguous pebbles, and the 

 general facies,'put beyond all doubt a glacial origin for these rocks. Some puz- 

 zling structures are seen in the outcrops of these rocks in the first gully east 

 of the Dunn's Creek road. Here there are, amongst the tillitic mass, patches 

 of banded rock showing contortions and characters identical with vai-ves, which 

 are cut across by similar rocks just in the manner in which a dyke cuts across 

 some country rock. The direction of the banding in the pseudo-trangressive 

 material is, in many cases, at right-angles to that in the main mass, the bands 

 in the former sometimes standing vertically. (The explanation of these features 

 is deferred till a microscopic examination of the material from the different por- 

 tions is made). 



The main fluvio-glacial conglomerates are the equivalents of those occurring 

 at Felspar Creek, near Seaham, and are about 300 feet in maximum thickness. 

 They are followed by 50 feet of varves, which carry small erratics, and have 

 suffered contortions while unconsolidated. In places the varves pass into coarser 

 material, which may be tuff. Overlying the varves there is about 120 feet of 

 fluvio-glacial conglomerate containing numerous striated pebbles. This horizon 

 may be seen to the north-east of the Paterson- Seaham road along the banks of 

 Dunn's Creek. The next unit is a fine-grained flaggy rock, not unlike quartzite 

 in appearance, being in all probability a tuff. It is about 25 feet in thickness 

 and is associated with a thin band of varve not more than 10 feet thick. Suc- 

 ceeding these one comes upon a dark olive-green mudstone containing some odd 

 plant stems and possessing a characteristic subconchoidal fracture. This horizon 

 is about 35 feet thick, and is very similar to a dark mudstone which occurs as- 

 sociated with varve-rock near Webbei-'s Creek, north of Gosforth (Osborne and 

 Browne, 1921). These rocks are succeeded by 150 feet of conglomerate which 

 has no special features. The total tliickness of the beds, which show an over- 

 lap in their disposition, is 1040 feet. 



At Seaham, to the west of the line of section described by Mr. Sussmilch, 

 there is a local development of tuff., 350 feet thick, being the equivalent of the 

 basal unit in the Dunn's Ck. section. The tuffs at Seaham are overlain by varves 

 and, close to the junction, there is a zone consisting of an intermingling of tuff 

 and varve, the constituents, in places, being entirely angular. Nearby the 

 varves have been altered by metamorphism of some kind, and the fragments in 

 the zone mentioned are also changed. The general features of the structures 

 here displayed remind one of the effects set up by the intrusion of tuffs into 

 claystones and cherts, to be seen in the Devonian rocks at Tamworth; but 

 pending detailed microscopic examination, one hesitates to regard the tuffs as 

 intrusive, realising that the structures may possibly be explained by considering 

 the effect of differential movement (gliding) upon a series of partially con- 

 solidated sediments. 



General Summwy of the Stratigraphy of the Kiittwng SeHest. 



The detailed examination of the whole of the type area has made it possible 

 to speak with certainty as to the maximum thicknesses of the various divisions 

 of the Kuttung Series. The results obtained for the maximum thickness of the 

 whole of that Series accords very well with the results published by C. A. Suss- 

 milch, although there is some adjustment necessary in connection with the in- 

 dividual divisions and subdivisions. Thus the thickness of the Basal Stage goes 

 up to 2300 feet, the foi-mer estimate having been placed at 3000 feet, and on 



