

260 V\ REPORT OF PROGRESS. K. W. CLAYPOLE. 



C. Shall on the county map, shows the lime shales of the 

 Lower Helderberg, and the following section can be made 

 out. Dip 35° N. 30° W. See Plate XXIV 



shaly limestone beds with Discina discus and a small sp. 



of Favosites, 3' 



Crinoidal beds, 3' 



Trematopora beds, 1' 0'' 



Shaly beds with Meristella laevis and M. bella, Tentacu- 



lites gyr acanthus, 12' 0" 



Crinoidal beds, . . . 2" 



Shaly bed with a few specimens of Rhynchonclla formosa, V 0" 



The Oriskany sandstone, No. VII 



The outcrop of the Oriskany sandstone in Madison town- 

 ship follows a line of considerable length. Entering from 

 Saville near Sandy hill it runs in nearly a straight line 

 across the township and for a short distance into Jackson. 

 Thence returning the syncline opens about the middle and 

 the southern limb, diverging from the northern, runs south 

 of Sandy hill and ends as an anticlinal ridge the south side 

 of which returns south-westward for about a mile and then 

 zigzags back and forth several times till arriving near Centre 

 township, it passes east out of the township along the north 

 side of the Limestone ridge. 



The Oriskany sandstone in Madison township is much 

 softer than in the centre of the county. It consequently 

 makes no conspicuous ridges and is with some difficulty 

 traceable over the ground. It is also more ferruginous 

 and more fossiliferous. It is consequently deep yellow or 

 red in color and yields a very sandy yellow soil. The dip 

 for t lie most part is gentle and the anticlinal folds to which 

 allusion has been already made show little steepness. It 

 would be exceedingly difficult to trace these folds were it 

 not for the outcrop of the Oriskany. 



The Marcellus lime-shales and limestone^ (VIIi.) 



This is the most interesting stratum to the geologist which 

 Madison township affords, [ts exposures are here more 



abundant and more nearly complete than anywhere rise, 

 and it La chiefly from this township that I have collected 



