U. S. GEOLOGICAL SURVEY 
BULLETIN NO. 272 PL. IX 
A. VIEW OF THE FALLS OF THE POESTEN KILL. 
Mear Barbarville, Rensselaer County, N. Y., on the western edge of the plateau. The 
stream is cutting the limb of an anticline of grit and shale. 
B. VIEW OF "THE GORGE" IN PITTSFORD, VT. 
Near the Chittenden line, taken looking N. 20° E. The cut is in quaitzite and is attributed to a fault. 
