BY VV. \. RKNSOX. 245 



from its gossany portions into the sandstone, it is evident that 

 both the hydration and subsequent siHcification of the serpentine 

 took place before the deposition of the sandstone. 



The general characters of the sandstone liave already been 

 mentioned (p. 232). West of the highly disturbed belt, occur 

 mudstones, which lithologically may belong to either the Middle 

 or Upper Devonian Series. These bear residual caps of sand- 

 stone and (13 miles north-west of Bingara) the basalt-cap of Mt. 

 Rodd, which rests on Tertiary drift overlying steeply dipping 

 greenish tuffs and mudstones. 



(For Explanation of PI ate- 1^, etc., see p.28-J.) 



19 



