﻿Plate 8 



Contact of the Potsdam sandstone on Grenville quartzite by roadside 

 I mile southeast of Redwood, looking west. The quartzite is somewhat 

 contorted but its dips are not steep, from 20-30 . The upper view is from 

 15 feet distance, the lower with the camera only 4 feet away and showing 

 only the lower layer of the Potsdam clearly. H. N. Eaton, photo, 1908 



