^WpPI* 



PLATE XI. U'i). — View ol Section B. showing four feet of Hamilton shales at 

 the base; the Encriual limestone, the Moscow shales, the Styliolina band, the 

 Genesee shales and a portion of the Cashaqua shales. 



jf ^Virt' 



,/,, — View of the Hucrinal limestone of Section (3, showing the undermining: of 

 the beci, and the recently fallen blocks. —Photographed by A. \Y. Grabau. 



