95 



of the corals common in the Cataract formation occur 

 here. Farther south, the dolomite cliffs may be seen 

 extending to the southeast. The road leads through fair 

 farming country, but the good land is often interrupted 

 by swamps, rock or glacial boulders. South of a small 

 church, glacial mounds and ridges occur, and glacial 

 materials obscure all else from there to Fossil Hill. 



A long climb past the exposed edge of Lockport strata 

 leads to the top of a plateau. A short distance to the 

 north, along a beautifully v/ooded road, opportunity is 

 afforded for collecting from the remains of a remarkable 

 Lockport coral reef. Just below the little south-sloping 

 grade, the ground should be carefully searched on both 

 sides of the road. The Lockport corals are nearly all 

 represented here, as well as other Lockport fossils including 

 Pentamerus oblongus. 



To the north of Fossil Hill, still higher beds of the 

 Lockport formation are preserved, the dolomites measuring 

 240 feet (73 m.) in thickmess. The Fossil Hill horizon 

 corresponds with that of maximum faunal development 

 about 100 feet (30 m.) from the base of the formation. 



THE ROCK. 



The prominent escarpment, known as "The 

 Rock", situated a short distance southwest of Manito- 

 waning, is composed of dolomite of the Cataract formation. 

 If one ascends the rock and continues westward from 

 the brow for half a mile, a rocky knoll covered with 

 sumach bushes will be observed. Here, the massive, 

 jointed rock is composed of the remains of a coral 

 reef. The reef builder appears to have been Diphyphyllum 

 cf. huronicum which was associated, particularly near its 

 edges, with Orthoceras sp., stromatoporoids and crinoid 

 colonies, the latter represented by numerous columnar 

 remains. Other fossils found at this locality are: — 



Chonophyllum belli Billings. 



Diphyphyllum multicaule {Hall). 



Favosites aspera d'Orbigny 



Halysites catenulatus micropora Whitfield. 



Orthis flabellites Foerste. 



Platystrophia biforata (Schlotheim) . 



Rhipidomella hybrida (Sowerby). 



