264 GREAr Sl-KPKyriNE-BKLT OF NEW SuLTH WALES, vi., 



Older Basalt 300 feet. 



Sands, clays, and ironstones 400 feet. 



These gravels, etc., contain a few fossils, namely, Unio Wil- 

 kinsoni, the seed Plesiocappmns leptocelyphis, and Phymatocaryon 

 MackayiaS). The presence of the seed suggests that the gravels 

 should be classed with the leads of the newer volcanics (see 40, 

 p. 479). Associated with these deposits are diamond-bearing 

 gravels containing a number of fragments of minerals, which 

 indicate their transportation by the ancestor of the Gwydir 

 from the granitic area to the east: the presence of topaz, tour- 

 maline, and wood-tin are especially suggestive. 



Mr. A. Mack, of Fallal Station, informed the wiiter of a 

 second mass of basalt with underlying gravels on the Bingara 

 Range, near Fallal Creek, five miles south of the gravels, etc., 

 mentioned above. These have not yet been investigated by any 

 geologist. 



v. The Far Western Zone. 



This region, which includes the Upper Manilla and Horton 

 River Valleys, is made up of rocks of Barraba, Burindi, and 

 Rocky Creek Series, with some Blue Knob dolerite. Tertiary 

 gravel and basalt. For clearness' sake, the description will 

 commence with the type-section di'awn east and west through 

 Burindi. East of the Station homestead, there is a well-marked 

 fault near the head of Hawkin's Creek, followed by an anticline 

 of Barraba mudstone and interbedded tuffaceous breccias, 

 beyond which the Barraba mud stones cross the Upper Manilla 

 Valley, dipping gently to the west. In the river, casts of Lej)i- 

 dodendronaustrale-AVii'dhnnda^nXj-, and a petrified stem of a zygop- 

 teroid fern obtained here, was presented to the Geological 

 Museum of the Sydney University by the late Lieut. Brian 

 Simpson, B.A. 



Inquiry at Burindi rendered it almost certain that the speci- 

 men occurred in situ, probably in or near some tuffaceous rocks 

 in the river-bed, about a mile north of the Station homestead. 

 This remarkable fossil is being examined by Mrs. Osborne, D.Sc, 

 F.L.S., of Adelaide, who has kindly informed the writer that it 

 consists of three closely associated stems, each surrounded by 



