BY W. N. BENSON. . 563 



ever, to be most probably only the dragged-down edge of the 

 strata adjacent to the fault. 



West of this limestone-horizon, is the monotonous series of 

 claystones and lenticular radiolarian limestones extending to the 

 foot of the ridge between the Moore Creek and Manilla roads, 

 which ridge is composed of the Baldwin agglomerates. For this 

 reason, the claystones must be correlated with the cherty rocks 

 that lie below the agglomerates, at the mouth of Long Gully, and 

 would, therefore, indicate that a variation of the degree of silici- 

 fication may occur when a series is traced along the direction of 

 the strike. Such variation is, indeed, very common in the rocks 

 of the Upper Middle Devonian Series, and often causes uncer- 

 tainty as to the proper correlation of isolated occurrences. 



The repetition of the Ui3per Middle Devonian Series is found 

 again on Moore Creek, where the limestone itself is repeated in 

 the small hill in portions 41, 42, 43 of the Parish of Woolomol, 

 which is the top of an anticline. This limestone is exactty 

 similar in all its features to the other large mass of limestone on 

 the southern side of Moore Creek, and must clearly be correlated 

 with it. Unfortunately, the whole of the central part of the 

 Parish of Woolomol is covered with drift, so that the details of 

 the stratigraphy are hidden. It may be safely assumed, how- 

 ever, that a fault separates the limestones in portions 41-43 from 

 the pyroclastic rocks immediately to the west of them, as the 

 intervening distance is far too small to permit of the unhindered 

 development of that part of the Upper Middle Devonian Series 

 which lies between the horizon of the Moore Creek limestone 

 and that of the Baldwin Agglomerates. 



The geological sequence is very indefinite south of the Peel 

 River owing to the want of clear exposures. The Baldwin 

 Agglomerates may be recognised on the hill east of Goonoo 

 Goonoo Creek, and all the country €ast of these is made up of 

 slightly silicified and soft radiolarian claystone, with lenticular 

 limestones and pyroclastic intercalations. These most probably 

 belong to the Upper Middle Devonian Series, but it has not been 

 possible yet to link up definite bands of pyroclastic rock with 

 similar bands north of the river. The alluvium of the Peel 



