94 



Chonophyllum belli (Billings). 



Coenites laminata (Hall). 



Cladopora laqueata Rominger. 



Cyathophyllum radicula Rominger. 



Diphyphyllum multicaule (Hall). 



Favosites gothlandica (Lamarck) . 



Heliolites interstincta (Linnaeus). 



Heliolites megastoma McCoy. 



Heliolites pyriformis Guettard. 



Omphyma verrucosa Rafinesque and Clifford. 



Syringopora retiformis Billings. 



Zaphrentis umbonata Rominger. 



Orthis flabellites Foerste. 



A try pa sp. 



Pentamerus oblongus Sowerby. 



Stricklandinia sp. nov. 



Platyostoma sp. 



Orthoceras sp. 



This formation above described is correlated on 

 fossil evidence with the Lockport dolomite of New York 

 State which is of Niagara age. It is this formation which 

 forms the escarpment at Niagara Falls, and the almost 

 continuous escarpment from Niagara to Manitoulin 

 island. 



Fossill Hill. 



For i-6 miles (2-57 km. south of Manitowaning the 

 Richmond formation has produced a soil of excellent 

 quality. In a corner of a field near the road the iron 

 casing of a drill-hole may be seen. This is one of the 

 many prospect holes driven within the past few years to 

 test the oil production of the Trenton formation, here 

 lying about 500 feet (152-4 m.) below the surface. Oil 

 has generally been obtained, but so far, it is claimed that 

 the quantity has not been sufficient to encourage the de- 

 velopment of the field. 



At the foot of a small hill, i-6 miles (2-5 km.) from 

 the village, the obscured contact between Ordovician and 

 Silurian starata is crossed. East of the road, sorted gravel 

 is exposed in a small pit. About 0-6 miles (0-7 km.) 

 farther south, Cataract dolomite outcrops forming a promi- 

 nent hill. The rock is composed of fossil coral reefs which 

 appear to have thickened the dolomite locally. Several 



