Tertiary Deposits of the Aire and Cape Otivay. 37 



than Apollo Bay (9). He published a sketch map (10) in which 

 he apparently relied on Wilkinson's survey for the details of the 

 country about the Aire River. By neglecting a thickness in 

 places of about 200ft. of dune rock, the seolian origin and extent 

 of which are clearly indicated by Wilkinson, he has shown a 

 large area occupied by the miocene of the survey. As regards 

 the courses of the streams through the Aire Marsh Wilkinson's 

 map, it may be mentioned, though the oldest, is the most correct ; 

 Krause's being singularly inaccurate both here and elsewhere, 

 a fact doubtless due to the enforced rapidity of the survey. 



Mr. R. A. F. Murray, who had accompanied Wilkinson on his 

 survey, gives in 1887 (11) a few further particulars, the outcome 

 apparently of some unofficial visit to the Ford. 



In 1895 Messrs. Tate and Dennant visited the Otway section 

 (12 and 13), but though they report that they carefully examined 

 the coast-line they were unable to find any of the outcrop west 

 of the Aire indicated by Wilkinson, with the exception of the 

 one in front of Mr. Robinson's house. As will be seen in the 

 sequel all the latter author's localities, with perhaps one exception, 

 are visible now just as he described them over thirty years ago. 



In January, 1897, the present authors spent about a fortnight 

 at the Aire, and found that Wilkinson's report and map were 

 excellent guides to the locality which we purpose describing in 

 some detail. 



The mesozoic sandstones which occupy such a large area of the 

 Otway district, are interrupted between Cape Flinders and Castle 

 Cove by newer rocks which descend to the shore and extend 

 inland for several miles, occupying a basin in the older series. 

 In these newer rocks Wilkinson recognised three distinct 

 members : — A set of marine and freshwater beds which he 

 regarded as miocene and which in common with Messrs. Tate 

 and Dennant we refer to as eocene ; another, consisting of 

 ferruginous conglomerates and sandstones flanking the slopes of 

 the mesozoic rocks, capping the lower hills and which be called 

 pliocene tertiary (5, p. 25) ; and lastly, the dune rock. 



To the S.E. of the mouth of the Aire the coast is occupied by 

 sand dunes with a few patches of dune rock on the beach and 

 near the river mouth itself. In places on the front of the cliff's 



