74 STRATIGRAPHICAL NOTES, ETC. 



bedded, unconformably overlying the nearly vertical sandstones, 

 etc., which form the staple of the formation prevalent in the 

 district, and which rises on the right bank of the O'Shanassy to 

 a greater elevation than the limestone." The summit of the 

 limestone formed a plateau which, I was informed, extended as 

 far as Rocklands, under the name of " Barkly's Tableland." I 

 believed the limestone to be the same as that described by 

 Daintree, from which the Tellina was obtained, and on this 

 account Barkly's Tableland was mapped as Cretaceous, whilst 

 the extension of the Cretaceous area to the south-east appeared 

 to agree with the " rolling downs " character described by the 

 explorers. It is needless to say that limestone of any age is 

 likely enough to furnish open, rolling and well-grassed " downs " 

 country. It is quite possible that the Carl Creek Limestone may 

 after all prove to be Lower Silurian ; although in that case there 

 remains the difficulty that the occurrence of the Tellina at 

 Eocklands has to be explained away. 



