121 



NOTES ON THE GEOLOGY OF THE MOUNT LOFTY RANGES 

 CHIEFLY THE PORTION EAST OF THE ONKAPARINGA 



River. 



By W. G. WooLNOUGH, D.Sc, F.G.S., Acting Professor in 

 Geology and Mineralogy, University of Sydney. 



Plates I. and II. 



[Read May 5, 1908.] 



The notes presented in this paper form a record of work 

 done during the years 1902 to 1904 inclusive, but principally 

 during the latter half of 1904. 



It is not claimed that they give a complete description 

 of the district. The area is so large and its geographical 

 structure so complicated that it will require years of patient, 

 painstaking work before its intricacies can be unravelled. I 

 had hoped to carry out this research, but my removal to 

 Sydney brought my labours to a sudden conclusion. All I 

 can hope to do is to give a general account of my work in 

 its unfinished condition, and to suggest lines of research 

 which may be followed by future observers. My best thanks 

 are due to the officers of the Mines Department of South 

 Australia for obtaining a pass for me on the South Aus- 

 tralian railways, which enabled me to take journeys which 

 would otherwise have been beyond my means. Mr. Gill, 

 Under-Treasurer, also interested himself on my behalf, and 

 I would include him in this recognition. 



I have also to thank the Rev. J. W. Gower for repeated 

 hospitality and advice as to routes, etc. To Mr. Stirling 

 Smeaton, B.A., I owe a debt of gratitude also. He 

 has interested himself much in my work, and has on many 

 occasions assisted me by obtaining information as to alti- 

 tudes, etc. 



No detailed traverses were made along the strike of the 

 beds, as many of the correlations did not become obvious until 

 the observations were w^orked up recently. I traversed the 

 whole length of the railway lines of the district on foot, and 

 most of the main roads by bicycle, and made a number of 

 pedestrian excursions across country as well. 



Mr. Howchin has given a complete and detailed account of 

 the geology of the western portions of the Mount Lofty area,(i) 



(1) Trans, and Proc. Eoy. Soc, S.A., vol. xxviii. (1904)., p. 

 253. Ihid, vol. xxx. (1906), p. 227. Aus. Assoc. Ad. Soc, vol. 

 xi., p. 414. 



