-.^ 



•f 



Fig. 5 Photomicrograph of Poughquag quartzite, taken in ordinar\- light, 

 magnification 65 diameters. Sample from ledge on the farm of Ward Ladue, 

 two miles south of Wiccopee. Showing the original rounded grains, out- 

 lined by iron oxide, and notable absence of minerals other than quartz. 



