REPORT OF THE STATE PALEONTOLOGIST 1902 1013 



Stations in the Oatka valley 



47 Ravine on west side opposite Pearl Creek. Exposed: lower 



Genesee shales, the Styliola limestone, the Upper Gene- 

 see shales and the Middlesex shale of the Portage group. 



48 Ravine on west side at Wyoming. The Cashaqua shales 



and the Rhinestreet shales. 



49 Ravine on west side. 2 miles south of Wyoming. Bristol 



shales. 



68 Ravine on west side. 2 1 2 miles north of Warsaw. Gardeau 



beds. 



45 Fall brook ravine 1 2 mile southwest from Warsaw. 



Gardeau beds. 



46 Gibson's glen, 2 miles south of Warsaw. Gardeau to base 



of Portage sandstone. 



69 Oatka falls near Rock glen. Gardeau to base of Portage 



sandstone. 



70 Quarries of Warsaw Bluestone Co. at Rock Glen. The 



Portage sandstones. 



Tonawanda valley section 



The western part of Wyoming county and southeastern part 

 of Erie county is an elevated region in which the higher ridges 

 and hills are 1500 feet to 3 700 feet A. T. It is in the drainage 

 area of Lake Erie and the Niagara river, and the streams flow 

 toward the north and west, cutting a large number of valleys 

 and deep ravines across the Portage rocks, in their rapid 

 descent of 600 feet to 900 feet to the broad level area that 

 borders the lake. 



The valley of Tonawanda creek is the most easterly one. It 

 extends southward from Attica for about 10 miles, is y 2 to 1 

 mile wide, and its sides are steep slopes, in which several small 

 streams have cut small gullies that expose the rocks. 



The rock section begins along the Tannery brook in the 

 northern part of the village of Attica, where there is a long 

 exposure of the upper Genesee shales. 



At the cascade 10 feet high, i /2 mile above the old tannery, 

 these light shales are succeeded by the black Middlesex shales. 



