MIDDLE THIRD OF THE GLENS FALLS QUADRANGLE 



■~ X" I / /■' I i ) I \' : 



THE GLEN LAKE AND OTHER SIMILAR ICE-BLOCK HOLES 



And the Pattens Mills Terrace 

 Scale 6250O 



The '■ ice-block hoh 



The Pattens Mill3 terrace was formed on the northern margin 

 part of the glacier covering the southeastern part of the area. 



A part of the Fort Edward outlet of Lake Vermont is shown In 

 southeast corner. 



interval 20 feet. 



Ice-block holes 



