168 Proceedings of the Royal Society of Victoria. 



'22 by 9, the long direction rouglily parallel to the beds. On the 

 western slope also patches of softer sandstone can be detected in 

 the sandstone. They are comparable in shape and position with 

 the pockets, and their upper surface, sometimes at least, is also 

 ■curved though not so strongly as their lower. Slate in the 

 pockets in the sandstone is not, however, confined to the one band, 

 ■others also occur, and it is probable that more of the pockets 

 were once occupied l^y slate. It is said that when first exposed 

 the sandstone in the pockets was hard. The hard sandstone in 

 which the pockets occur softens near the surface and presents an 

 appearance very like that in the pockets. 



On the western side the chief point of interest is the form of 

 the softer beds intervening between the sandstones. Sandstones 

 greatly predominate at the south end of the cuttiiag, and at first 

 the slate beds vary slightly in thickness from point to point, the 

 boundaries of the beds undulating and the upper and lower 

 .surfaces of the slates not corresponding. Further on, a thicker 

 bed of slate occurs, which is very much contorted internally. 

 At first the laminae of the upper portion are contorted and 

 overfolded, further on a fracture crosses the bed obliquely, 

 accompanied by a number of minor parallel fractures, all of 

 which, as regards the laminae, present the appearance of thrust 

 planes, but the contacts with the adjacent sandstones above and 

 below are only deeply curved and not faulted. The result of this 

 is a considerable thickening of the slate at this part. 



In another slate bed a long wedge of sandstone is seen to 

 project into the slate. This wedge measures about 8 feet in 

 length on the exposed surface. 



Further north there occur slate beds of very irregular 

 ■character. One isolated patch of slate is of very irregular form, 

 but with its longest diameter parallel to the beds, and a crack 

 with slate fragments, continues in the same direction. Below it 

 is a band of much broken slate mixed with coarse sandstone and 

 of very irregular thickness. This continues north and takes the 

 form of fairly continuous slate beds, with coarse sandstone between. 

 An oblique hollow occurs in the underlying sandstone, into which 

 a mixture of slate and course sandstone enters. The lower slate 

 band subsequently divides, a small pwtion continues on its natural 

 course for a short distance, but a more prominent oblique band 



