Art. XVIII. — Geological Notes on tJie River Yarra Tm- 

 provenient Sections at the Botanical Gardens and 

 vicinity, Melbourne. 



By a. E. KITSON, F.G.S. 



(With Plates XLI. and XLII.) 



[Eead 13th December, 1000.] 



The notes incorporated in the following paper were made in 

 the year 1898, during the time work was in progress straighten- 

 ing the course of the river Yarra, between Brander's Ferry and 

 Cremorne Street, Richmond. The work was carried out by the 

 Public Works Department on the recommendation of the Floods 

 Prevention Board to prevent the flooding of the low-lying 

 portions of Ptichmond and South Yarra during heavy rains in 

 the Yarra basin. It was originally intended to carry the works 

 up to the Cremorne Railway Bridge, and it was the. hope that the 

 section on the northern side of the river would reveal the relation 

 of the basalt to the shell-bearing marls showing in the cuttings 

 that caused the delay in bringing these notes before the Society. 

 The excavation on the northern side of the river near the 

 Friendly Societies' Gardens did not, as far as noticed by me, 

 afford sufficient evidence regarding this relation, but as the 

 extension of the works referred to has been suspended by the 

 Government there is nothing to be gained by further delay. 



The accompanying map of the locality under review, is based 

 upon the contour map of jNIelbourne and suburbs published by 

 the Department of Lands and Survey, with the Yarra improve- 

 ments, geological and other information added. The area is 

 embraced in Quarter Sheet iSTo. 1 of the Geological Survey. 



The country may be seen from the map to comprise the narrow 

 valley of the Yarra and the bordering Silurian ridges. These 

 ridges are rather steep on the southei-n side, but rise gently on 

 the northern except near Prince's Bridge where they are much 

 steeper. The southern ridge is covered by the remnant of a 



