Ordovician Rocks at Daylesford. 173 



erate occurring in three localities. One locality is a little to the 

 Melbourne side of the 73 mile post. The sandstone here in which 

 slate fragments appear embedded is of coarser texture than 

 others in the vicinity, though fine compared with what might be 

 expected in a conglomerate with fragments of the size seen. 

 Near the 72 mile post slate bands and fragments are again seen 

 in coarse sandstone, the general direction of the slate being 

 parallel to the beds, and their arr'angement might at one place- 

 be due to contortion. Through the cuttings from Chewton tO' 

 the Elphiiistone tunnel irregular thickening of slate, sometimes 

 at joints and cross fractures in the sandstone, interruption of 

 slate beds and squeezing of slate into cracks were frequently 

 noticed, and apparently detached slate fragments. At one place 

 beds of sandstone up to 11 inches in thickness are broken and 

 the intervening slates come together. 



A conglomerate of somewhat different character occurs under 

 the down distant signal post at Chewton. The exposed sui'face 

 shows subangular and rounded sandstone fragments in a slaty 

 paste, the slate between the sandstone sometimes shows contor- 

 tion ; slaty material also enters the cracks in the sandstone, the 

 thickest sandstone bar runs for about four feet with a varying- 

 thickness to three inches, but most of the sandstone appears 

 fragmentary. This occurrence might represent the extreme stage 

 of contortion such as that at Bald Hills Creek, but at Chewton 

 the sandstone is in greater proportion and contortion not so clear,. 

 It approaches closely to the other conglomerates, except that the 

 slate predominates and appears therefore as the more continuous 

 matrix, the sandstone appearing fragmentary. 



The catalogue of the rocks of Victoria in the Technological 

 Museum records a conglomerate of tine grained, often micaceous- 

 sandstone, enclosing rounded pieces of slate fi-om Section 50, 

 parish of Spring Plains, Quarter-sheet 13 N.E. I find no note 

 of this on the Quarter-sheet, but oblique lamination of slates and 

 sandstone (to be referred to later) and contortion are frequently 

 recorded near this point and elsewhere on this sheet. 



On Chinaman's Creek, north-west of Castlemaine, Quarter- 

 sheet 14 S.E., a note records fragments of slate embedded in a 

 surface of sandstone. 



