Ordovician Bochs at Daylesford. 167 



north-west of Daylesford, which must not be confused with this. 



The direction of the railway cutting close to the lake is about 

 IST. 25° AV., the strike of tlie rocks N. 40° W., dip south-westerly 

 at 50°. The eastern or inner face of the cutting, about 40 feet 

 high, is thus taken out almost on the bedding planes, or follows 

 them for some distance. The outer low western bank, about 12 

 feet high, is a cross section of the beds, almost at right angles to 

 the bedding, but the slight angle between the strike and the 

 direction of the cutting allows the same beds to be seen on both 

 sides. The railway turns a little more northerly and produces a 

 deceptive appearance of a twist of the rocks on their strike. 



A considerable surface on the inner slope parallel to the beds 

 presents an appearance suggestive of ripple marking. A series 

 of undulating ridges run across it, approximately parallel and 

 nearly horizontally at intervals of 3 or 4 inches. Their upper 

 slope is more steeply inclined to the general direction of the 

 surface than their lower, and they are crossed obliquely, especially 

 on their downward slope, by smaller ridges, also roughly parallel 

 to one another and undulating. The rock is a micaceous 

 sandstone. 



Shallow curved depressions also appear, and a little farther on 

 the exposed surface of a hard sandstone is crowded with peculiar 

 pits or pockets. These are hollows of various shapes and sizes, 

 one, about 2 feet 6 inches across, reached a foot below the general 

 sui'face of the bed. They are bounded by curved surfaces, and 

 are generally steeper on one side, meeting the gently undulating 

 surface of the bed, or of another pocket at a considerable angle. 

 Often a number of the pockets are confluent. The sides of the 

 pockets are frequently marked by curved ridges parallel to one 

 edge and ending abruptly with the surface on which they appear. 

 The pockets are usually empty, but sometimes filled by a softer 

 sandstone, or by cleaved and jointed slate. Pockets filled with 

 slate at one place form a prominent line running obliquely up the 

 side of the cutting in a position which would correspond to the 

 outcrop of a thin bed of slate, but the slate is discontinuous. On 

 the opposite side of the cutting a disconnected slate patch is 

 noticeable in about a corresponding position. The largest slate 

 patch exposed on the east slope measured 16 inches by 12 inches, 

 on the other side one was noticed in cross section measuring 



