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BY W. N. BENSON. 



261 



bringing the agglomerate to the surface. 

 This contains cherty bands, and dips gently 

 to the E.N.E. at from 15'^ to 30', but, near 

 the main road, it is directly overlain by the 

 Barraba mudstones, and the dip changes 

 sharply to E.8.E. at 47 ^ The mudstones 

 here contain a very hard band of tuff 

 quarried for road-metalling. The section 

 has not yet been traced further east, and 

 the mapping of the Burindi rock at its head 

 is conjectural. 



The section along Anderson's Creek is 

 shown in Text-fig. 8. Commencing at Cob- 

 badah Creek, the valley is in agglomerates 

 for some distance, then passes across the 

 main fault, which continues northwards 

 along Duckholes Creek. For a mile further, 

 the creek is off and on the agglomerates, 

 which are rather contorted, but then passes 

 on to the mud stone near Glen Arthur 

 homestead. East of this is a sharp con- 

 tortion, indicating a thrust from the north- 

 east, and the Baldwin agglomerates come 

 to the surface again. Here they contain, 

 intercalated, a flow of spilite-lava with 

 large f elspar-phenocrysts (1, Pt. iii., p. 665). 

 This ilow is about 50 feet thick. Associ- 

 ated with it, is a band of grey tuffaceous 

 chert. The dip is to tiie east at 7^ but, 

 in a few yards, it rapidly increases to E. 10" 

 N. at 54^ at the eastern limit of the 

 agglomerate, and is still steeper to the east. 

 From here, the rocks are all steeply-dipjDing 

 mudstones. A break in the section is made 

 here, and it recommences again a mile to 



* Geological section along Anderson's Creek. 



Tcxt-H'T.S.* 



