BY W. N. BENSON. 337 



and, in addition, there was a section exposed of a form very 

 similar to Cystiphyllum vesicuiosum which unfortunately could 

 not be removed for more careful examination. 



South of this, where the limestone is split into two bands bv 

 a zone of tuff, the feature noted in Portion d8, namely, the 

 abundance of fragments and pebbles of chert in the limestone, is 

 again present. It must also be mentioned that, throughout the 

 length of the zone of the Loomberah limestone, the chert over- 

 lying it contains numerous small inti-usions of tuflP. 



The tuff associated with the limestone may be traced down 

 into the valley of Cope's Creek, and beyond it to the south. 

 Here, probably, was obtained the specimen of Phillipsastrcea 

 verneuilii recognised by De Koninck. The small patch of lime- 

 stone occurring on the top of the hill, a mile and a half W.S.W. 

 of the Permo-Carboniferous sandstone at ReicheFs homestead, 

 near Bowling Alley Point, probably belongs to this series. Jt 

 has been already pointed out that it does not lie on the same 

 horizon as the Nemingha limestone. . A lenticular mass of lime- 

 stone occurs near Cann's Plains Creek, still further to the south, 

 and probably belongs to the same horizon(3, p.574). Thus we 

 can trace the Loomberah horizon intermittently from the north- 

 west of the Parish of Loomberah, to within two miles of Bowling 

 Alley Point, and have thus obtained a second definite horizon 

 linking the geology of the Tam worth District to that of Nundle. 

 But there is still another mass of limestone that may possibly 

 belong to the same horizon, though so altered by recrystallisa- 

 tion in the region adjacent to the serpentine, that no traces of 

 fossils have been found in it. This is the lenticular mass of 

 white marble in the south-eastern corner of the Parish of 

 Nemingha, Portion 121, mentioned previously {see 6, p.560). It 

 is about four hundred yards long and sixty yards in width as a 

 maximum measurement, the main visible portion being only two 

 hundred by twenty yards in length and breadth. 



