279 



These places may iiulicale lenses in tlie sandstone or shale of the overlyiug 

 unconformable Pennsylvanian. rooks. 



At 18 the cut shoAVS the unconformity and a mass of bog iron ore, coal 

 and purplish-drab shale, resting on the sandstone only a few feet above the 

 upper limestone. In cut 20 and the top part of 21. Pennsylvanian shale 

 rests unconformably on the upper sandstone. 



Between yoLsberry and the viaduct, the railroad grade is about on a 

 level with the top of the upper sandstone so that nearly all the cuts are 

 in Pennsylvanian rocks. At 27, section VI was obtained. The iron ore 

 (replaced limestone) of this section appears to be correlative with the upper 

 limestone from stratigraphic and faunal evidence, which, however, is rather 

 meagre. Goal occurs beneath it, while the sandstone above is probably of 

 Pennsylvanian age. 



Owing to the fact that it is replaced, only casts of shells remain, and 

 in many cases these are unidentifiable. In view of this the correlation with 

 the upper limestone nnist be tentative. 



