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of dark grey to black shales (zone 2) with either splintery 

 or papery cleavage and an upper one (zone 3) of more or 

 less sandy bright green shales with which are interstrati- 

 fied numerous lenticular beds of compact, finely cross- 

 laminated quartz sandstone. What appears to be the 

 basal portion of the Ross Brook formation also outcrops 

 on Barney's river opposite Avondale station on the Inter- 

 colonial railroad, where beds lithologically and faunally 

 similar but without any graptolites form a cliff about 30 

 feet high on the north bank of the river. 



The fossils which are characteristic of the formation are : 



Monograptus clintonensis 



M. priodon chapmanensis 



Retiolites geinitzianus venosus 



Orbiculoidea tenuilamellata 



Dalmanella elegantula 



Leptaena rhomboidalis 



Plectambonites transversalis 



Chonetes tenuistriatus 



Camarotoechia near equiradiata 



C. cf. obtusiplicata 



Rhynchonella cf. robusta 



Anoplotheca hemispherica 



Anabaia anticostiana 



A. depressa; and Calymene tuberculata. 

 Zone I. — Black, rusty weathering papery shales which 

 as a rule are little fossiliferous. The identified fossils are 

 Anoplotheca hemispherica; Anabaia anticostiana; and Lin- 

 giila cf. oblongo; The estimated thickness is 200 feet (61 m.). 

 Zone 2. — Dark-grey to black, rusty weathering shales 

 with splintery or papery cleavage. In the shore cliffs the 

 zone shows much disturbance and in some places the 

 attitude changes with nearly every ten-foot interval. It 

 is quite fossiliferous, particularly in graptolites, while 

 pelecypods and brachiopods are comparatively common 

 throughout and at a few levels are very abundant. The 

 identified fossils arfe : — 



Monograptus clintonensis 



M. priodon chapmanensis 



Retiolites geinitzianus venosus 



Orbiculoidea tenuilamellata 



Dalmanella elegantula 



Chonetes tenuistriatus 



Anoplotheca hemispherica 



