CV W. X. UKNSOX, W. 8. DUX, AXU \V. R. BROWXF;. 291 



aljout a huuflred yards in leng-tli ou the western edge of Conditional Purchase 

 Leiiso 172 in the south of the Parish of Baljbinboon. Mr. Chapmnn in private 

 communication states that the former rock contains stem-joints ;'nd nodal joints 

 of a crinoid, which are like those that may be seen in the IIexaeri)iichte, though it 

 would be hazardous to point out their exact relationship on such n\eagre evidence. 

 Numerous gT'ooved brachial ossicles occur as nuclei in the oolitic gi-ains of this 

 Jock. This limestone is interstratified in a calcareous mudstone with abundant 

 crinoids and some corals, dipping E 30° X. at 40°. 



We now return from this long digression to trace further southwai'ds the 

 tectonic structures. The Bnrindi beds have lieen traced down the western side of 

 the Peel Range to the ('urral)ubula Creek at Piallaway, and preserve throughout 

 an easterly dip, though with slight variation in strike and inclination, and doubt- 

 less form the western limb of the syneline, and are overlain by Kuttung rocks. 

 South-east from Piallaway, the diverging ranges of Kuttung rocks are sei^arateJ 

 by an extensive volcanic formation, the Werrie Series, chiefly composed of basalt 

 flows overlying the Kuttung rocks, and as the main syneline plunges more deeply 

 to the south, these form the broad i>lain l)etweeu Currabubula and Werris Creek 

 townships, enclosed by the ranges of Kuttung rocks to the east and west. The 

 eastern range is the main Peel Range and is the more continuous, though tra- 

 versed by several gaps. It extends past the Cunabubula. Werrie's and Quii)olly 

 Creeks and continues southwards towards the Liverpool Ranges, the component 

 rocks liaving a gei.eral dip of 35° to 40° in a direction about W. 20° S. The 

 euesta or diji-ridge cliaracter of the ranges is most marked, es]iecially where, as 

 in the Currabubula District, tliey contain very resistant stratiform masses of 

 andesite. The marine rocks continue in a zone dipping beneath the Peel Range 

 and resting in turn upon the Lepidodendroti aiistrale beds (Barraba Series), as 

 noted at Goonoo Goonoo by Clarke (10) and Stonier (111. Ch:iracteristic fos- 

 sils have l)een obtained east of Curi-abubula (see later) and further south at 

 Gowrie and particularly at Goonoo Goonoo. 



The following fossils have been recorded in the last two districts: — Martinia 

 sp., Xiieula sp., Entolium aricidatum. Ariculnpecten sp.. yincrdchilhui, Yraiiin 

 konixcki, Orthoceras •<]!. 



The westerly segment of the syneline of Kuttung rocks crosses t'urral)ul)ula 

 Creek by Piallaway and continues southwards across "Werrie's Creek (whicii occu- 

 pies a narrow defile ) to Quipolly Creek. 



South of Werris Creek, the opening between these diverging ridges is par- 

 tially closed by a little cross warping bringing up a minor anticline of Kuttung 

 rocks and cutting off a small basin of Werrie Basalts. Between this ami the 

 western range there lias been let down into the Werrie basalts a small patch of 

 Glossopteris-henrins: sandstone, possibly belonging to the Newcastle Series. Thus 

 the region of Werrie basalts between Curral)ul)ula and Werris Creek forms almost 

 an enclosed' basin. Within this the low land is interrupted by the resistant moun- 

 tain ma.ss of Warragundi, a volcanic complex, from which extends a 

 series of ridges following a bundle of dykes, running in a curve to the south-west. 

 To the north-west, the Dunover Mountains appear from a distant inspection to be 

 also a complex of volcanic rocks, more resistant to erosion than the surrounding 

 basalts. Here and there are minor intrusions of basalts, probably of Tertiary 

 age. and recent alluvium occurs in some amount in tlie valleys. 



The main structures and formations have been now outlined, but the details 

 of stratigraphic succession of tlie sef|UPnce of iuiieous events and flie coniiilexifies 



