122 GEOLOGY MAITLAND-BKANXTON DISTRICT, 



Edmo7idia(l) nobilissima. Ptycomphalina trifilata. 



Palcearca subarguta. P. morrissiana(\). 



Merismopteria macroptera. Keeneia platyschismoides. 



M. n. sp. Platyschisma oculus. 



M. sp.ind. P. depressa. 



Avicnla inlumescens. C onularia inomata. 



0. Iceviyata. 



Following the Harper's Hill beds, there are 560 feet of light- 

 coloured mudstones, with two horizons of limestone-bands. The 

 mudstones are somewhat calcareous, but, in the outcrops from 

 which this section was obtained, they contain few fossils. 

 Further south, however, near Pokolbin, there are numerous 

 fossils in them (see later p. 125). At about 130 feet above the 

 base of the mudstones, there occur in several localities (marked a 

 on the map) limestone-bands containing marine fossils, amongst 

 which Fenestellidae are abundant. The following fossils occur on 

 this horizon : — 



Stenopora. Aviculopecten squamuliferus. 



Fenestella(1) fossula. Platyschisma. 



F.(l) internata. Euomphalus( t :). 



Spirifer. Ptycomphalina. 



In the cuttings, along the road from Allandale Railway Station 

 to the main northern road, a number of small faults can be seen, 

 which, however, cannot be traced on the surface. They appear 

 to be a series of step-faults, with small throws to the north-east. 



At 420 feet from the base of the same mudstones, there is 

 another series of limestone-concretions at several places (marked 

 /3 on the map), but these contain only very few fossils. 



Almost at the top of these beds, just below the Ravensfield 

 Sandstone, in portions 46 and 47, Parish of Heddon, there are a 

 number of large granitic erratics. 



The mudstones are the topmost beds of the Lochinvar Stage, 

 and are followed by the Ravensfield Sandstone, the lowest beds 

 of the Farley Stage. 



