The Geology of the Loiver Le'iijli Valley. 61 



massive limestone crops out about 12 feet from the water's edge. 

 Both above and below there is clayey material containing tlie 

 usual fossils. In the limestone itself the fossils are scarce, but 

 they include only forms common to the clays. At a height of 

 100 feet the eocene is overlain by the lower basalt, which 

 continues for the next 30 feet, when ironstone nodules of 

 supposed miocene age succeed. The rocky basaltic promontory 

 close to this outcrop is locally known as Point Henry ; it forms 

 really the eastern boundary of the lower flow, since, as we have 

 seen, there is no sign of basalt from the base to the summit of the 

 adjoining section on the east (No. IX.). At Sec. VII., nearly 

 opposite on the western bank, the fossiliferous beds appear at 

 the margin of the stream. Their junction with the overlying 

 basalt is masked by soil, but a few boulders of the latter rock 

 were noticed at a height of 150 feet. Fossils are abundant, 

 though generally very fragile. Still, a few good shells were 

 obtained here, and, by washing the fine calcareous material, 

 many examples of the minuter species were added to our collec- 

 tion. The bed belongs to the type of the marls of the amphi- 

 theatre, and contains the same species. A few chains to the 

 south, but about 60 feet up the bank, we observed an outcrop of 

 limestone rocks in a gully running back from the river. Amongst 

 some others, we noticed the following common fossils in this 

 limestone : — 



Bullinella aratula Nuculana vagans 



Amussium zitelli Meretrix eburnea 



We traced this gully up almost to the basalt-covered table- 

 land at the summit of the bank, and noted the following out- 

 cropping strata : — 



Newer basalt ... ... ... 40 feet 



Ironstone, probably miocene (no fossils 



observed) ... ... ... 30 „ 



Limestone, with Cellepora fossa ... 40 „ 



Lower basalt ... ... ... 50 ,, 



Limestone, partly masked by alluvium 100 ,, 



Total heio-ht of bank .. . ... 260 feet 



