The Geology of the Lower Leigh Valley. 57 



also at the third station, 50 yards higher up still, the bands run 

 horizontally due east and west. There is thus a change of 

 direction in the face of the cutting amounting to aliout 5° 

 between the first and the succeeding stations. At the same 

 time the dip changes abruptly from 4° to 0\ Either there is 

 current bedding for a short distance, or, as is more likely, by a 

 slight change in the direction of the cutting at the first station, 

 the true dip from the hill, i.e., towards the north, is indicated. 

 The rocks are too rough and crumbly to admit of very exact 

 measurements. 



Fossils are not only very scarce in the section, but they are 

 also so rotten, that in an hour's search only a few fragments were 

 obtained. Amongst them we recognised the following : — 

 Dimya dissimilis Cidaris spp. (spines) 



Ostrea hyotis Cellepora fossa 



Terebratula sp. Lunulites rutella 



and other species of polyzoa. 



The organisms were traced up to an elevation of 150 feet 

 above the water's edge, but unfossiliferous limestone was found 

 for .30 feet higher. Above the limestone, ironstone boulders 

 occur and continue to the hill-top. These again we class as 

 miocene. 



It may be conveniently mentioned here that the river level at 

 Shelford Bridge is the datum line, to which reference is 

 occasionally made in this paper. Its height above sea level is 

 not precisely known, but from aneroid readings, with Leigh Road 

 Railway Station for the starting point, we estimate it as between 

 220 and 250 feet. 



In following up the river from the bridge through Golf Hill 

 pre-emptive block, the eocene is practically concealed beneath 

 later deposits, but that it is still present is proved by the nodules 

 of limestone thrown out of rabbit burrows, or from holes dug by 

 the station people. Higher up, the banks are steeper than in the 

 neighbourhood of Golf Hill, and several fine sections of the 

 eocene are exposed. The most prominent of them is on the 

 eastern bank, immediately south of a small island, locally known 

 as Bull Island, which is formed by a short billabong in the course 

 of the river. Perhaps the prettiest scenery in the Lower Leigh 

 Valley is to be found here. The fossil banks form an amphi- 



