1859.] WOODS TERTIARY ROCKS. 253 



The author next described the granite, gneiss, and slaty rocks 

 along a section extending from the River Murray and Kangaroo 

 Range across Mount Barker and Mount Lofty towards Adelaide, 

 and noticed the mode of occurrence of the ores of copper, iron, lead, 

 &c., in these rocks. Lastly, he noticed and explained the occurrence 

 of calcified stems of trees standing in the position of their growth in 

 the sand-dunes of the Gulf of St. Vincent, near Adelaide. 



4. On some Tertiary Rocks in the Colony of South Australia. 

 By the Rev. Julian E. Woods, F.G.S. With Notes on the Fossil 

 Polyzoa and Foramintfera, by G. Busk, Esq., F.R.S., F.G.S. , 

 W. K. Parker, Esq., Mem. M.S., andT. Rufert Jones, Esq., F.G.S. 



I propose to submit to the Society a description of an extensive 

 Tertiary deposit in South Australia, which has never received more 

 than a passing notice from any who have previously called atten- 

 tion to it. The beds to be described occupy so great a tract even 

 of the large colony of South Australia, that they will, I am sine, 

 eventually call forth a minute examination from those more com- 

 petent than myself. If there were any probability of a geological 

 survey of the place, under Government-auspices, I would not step 

 forward to do what would then be better done in a much shorter 

 time. But there is no probability of this. Victoria, alone, of all the 

 Australian colonies, as far as I am aware, employs a geological 

 surveyor; and of course he will not be permitted to extend his 

 investigations far beyond the boundaries of that colony. As there- 

 fore there is no likelihood of any organized scientific inspection of the 

 country I am about to describe, I venture to submit to the Society 

 my own imperfect observations on facts which it may prove useful for 

 science to be in possession of meanwhile. 



The formation which is the subject of my observations extends 

 westward and southward from the River Murray. The line ./• .<■ 

 across the map marks the northern boundary of the district with 

 which 1 am acquainted (aboul 29U miles long, by an average breadth 

 of 7" miles). This is all occupied with the tertiary limestone, 

 excepting Bome small patches of post-tertiary deposits. A line of 



trap-rocks almost exactly follows the boundary-line of the two 



colonies; and then the tertiary lie. is reappear and continue to Port 



Fairy in Victoria, about 60 miles from the boundary. 



The whole formation, and indeed the w hole country laid down on the 



ma]i. is remarkably Level and horizontal throughout : the only excep- 

 tions being some few ridges, which never rise more than 200 feel 



above the plains, four extimt craters, and half a do/cii hills raised 



by trap-dykes. The latter are in the southern portion of the district. 

 In the north, on the edge of the Malice Scrub (Eucalyptus dumosa), 

 there are two or three ranges of porphyry rocks, forming chains of 

 small eminences, Mime 50 feet in height, which run aboul easl and 



