65 



fill with water. The upper beds are undoubtedly of 

 Onondaga age, but the underlying strata have been the 

 cause of considerable controversy The section in descend- 

 ing order is as follows: — 





Thickness. 





Feet. | Metres. 



Onondaga (Devonian) — 



I. Dolomitic limestone 



35 



24 

 4-5 



10-64 

 7-29 



I -2-1 -5 



Monroe (Silurian) — 



2. High grade limestone 



3. Brown dolomites 



I. The Onondaga 1 mestones are fossiliferous in 

 places, but the locality can no longer be called a favourable 

 collecting place. The following species are of common 

 occurrence : — 



Favosites hemispherica, Yandell and Shumard. 

 Michelinea convexa, D'Orbigny. 

 Streptelasma prolificum, (Billings), Lambe. 

 Syringopora hisingeri, Billings. 

 Atrypa reticularis, (Linn.) 

 Leptaena rhomboidalis, ( Wilckens. ) 

 Meristella nasuta, (Conrad.) 

 Reticularia fimbriata, (Conrad.) 

 Rhipidomella livia, (Billings.) 

 Spirifer varicosus, Hall. 

 Stropheodonta demissa, ( Conrad.) 

 Stropheodonta inaequistriata, (Conrad.) 

 Stropheodonta perplana, ( Conrad. ) 

 Strophonella ampla, Hall. 



2. A peculiarly ridged and undulating surface is 

 presented by the beds of high grade limestone, where the 

 overlying Onondaga dolomites have been removed by 

 quarrying. Grabau interprets this surface as of eolian 

 origin and as having been made in early Devonian time. 

 The underlying limestone (Anderdon beds) and the brown 



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