Art. XIV. — On some Features of the Ordovician Rocks 

 at Daylesford ; with a coTuparison with similar 

 occurrences elsewhere. 



By T. S. hart, M.A., B.C.E. 



[Eead 12th December, 1901.] 



The Ordovician or Lower Silurian Rocks occupy the surface or 

 occur at no great depths over the whole area around Daylesford. 

 Numerous natural and artificial sections show that the rocks are 

 much folded. The general strike is between north and north- 

 west. Mr. F. M. Krause^ states that the general strike of the 

 beds in the latitude of Wombat Hill is 16° to 22° west of north, 

 approaching further north more and more to the magnetic 

 meridian. In my own observations several localities further 

 south show a strike much more to the west of north. The dip 

 varies from 45° to vertical. The Ordovician age is indicated by 

 the graptolites found in several localities. Mr. T. S. Hall- has 

 correlated a portion of them at least with the lowest parts of the 

 Castlemaine series. 



No granitic areas or other extensive plutonic rocks occur any- 

 where near Daylesford. 



The area to the north of Daylesford forms Quarter-sheet 16 

 N.E., mapped by the late Mr. Norman Taylor, and published 

 1893 ; that to the south (16 S.E.) has been mapped by Mr. S. 

 Hunter, published 1895. I propose in this paper to notice 

 certain minor features connected with the folding of the rocks, 

 and to compare them with similar occurrences elsewhere. 



An interesting section, presenting unusual features, is seen in 

 the railway cutting at Italian Hill, on the Daylesford-Ballarat 

 Railway, Quarter-sheet 16 S.E., immediately north of the lake 

 (the lake is formed by damming the stream marked Wombat 

 Creek on the map). There is another Italian Hill some miles 



1 Progress Report of the Geological Survey of Victoria, No. 5. 



2 Proc. Royal Society of Victoria, vol. vii.. New Series. 



