9. MADISON TOWNSHIP. 



F. 2G1 



the evidence, both stratigraphical and palaeoritological, 

 whieli has enabled me to assign its true position. 



The limestone in question has been regarded as the rep- 

 resentative of the Cor niferous formation of the New York 

 series, solely on account of its position at the base of the 

 Marcellus black shale. But no trace of the great deposits 

 of flint which characterize that horizon in New York are 

 found in Perry county. Nor have any Corniferous fossils 

 afforded to the palaeontologist satisfactory evidence of the 

 correspondence of the two strata. 



Several good though partial sections in Madison township 

 afford valuable stratigraphical evidence in favor of a dif- 

 ferent opinion. The following are the details of the expo- 

 sure at Dr. S. M. Tudor s quarry near Centre Mills, where 

 the stone is quarried for building and for burning. It will 

 be seen from the section that the limestone beds here are 

 very solid : 



Tudor s Quarry section, {bottom of VIII.) 



Limestone, 



. . 2" 



Limestone, 



. 12" 



Dark shale, . 



. . 1" 



Dark shale, 



6' 



Limestone, 



. . 2" 



Limestone, . . 



4" 



Dark shale, . 



. . 2'' 



Dark shale, 



2" 



Limestone, .... 



. . 6" 



Limestone, . . 



6" 



Dark shale, . 



. . 3" 



Dark shale, 



3" 



Limestone, 



. . 6" 



Limestone, 



6" 



Dark shale, . 



. . 1" 



Dark shale, 



3" 



Limestone, . . 



. . 4" 



Limestone, . . 



8" 



Dark shale, . 



. . 1" 



Dark shale, 



1" 



Limestone, 



. . 8" 



Limestone, 



12" 



Dark shale, . 



. . 3" 



Dark shale, 



1' 



Limestone, . . 

 Dark shale, 



. . 6" 

 . . 4 



. . 8'' 



. . 4" 



Limestone. 





Limestone, 



Dark shale. 



10' 7" 



Here is a series of fifteen beds of limestone alternating 

 with fourteen beds of dark shale exactly resembling some 

 parts of the Marcellus shale. It is black when wet. bur 

 dries to a peculiar reddish tint as do many of the layers in 

 the Marcellus proper. There is no impropriety, therefore, 

 or stratigrapical evidence in referring the whole mass in 

 question to the Marcellus, and this conclnsion is corroborated 

 by the presence of Marcellus fossils in several of the lower 



