LIST OF ILLUSTRATIONS 



FIG. PAGE 



1 Manner of deposition of varve clay 2 



2 An exposure of varve clay facing 4 



3 View showing the method of measuring the clay 



layers facing 5 



4 Sample of measurement made in the field and curve 



constructed from it in the office 5 



5-12 Maps showing the position of the localities examined 



in the Connecticut Valley. Scale, 1:160,000 . . . 37-44 



13 Map showing the position of the localities examined 



in the Merrimac Valley. Scale, 1 : 160,000 .... 45 



14 Curves showing three drainages of ice-ponded lakes 



into the Connecticut River above the Passumpsic 71 



15 Section at locality 24, southeast of Amherst, Mass, . 77 



16 Part of curves at localities 19 and 20, Northampton, 



Mass. . . • 78 



17 Annual rate of ice retreat in southern Finland, after 



Sauramo 92 



18 Curve showing drainage during years 5671-5676 



recorded at locality a, Catskill, N. Y 98 



19 Part of curves at localities 27 and 28 near Greenfield, 



Mass 102 



Plates 



Pl. 



I-V [Normal curve, covering 4,400 years in 21 sections, 

 recording the recession of the edge of the last ice sheet 

 from Hartford, Conn., to St. Johnsbury, Vt. (At bot- 

 tom of PI. V, curves I — III, three groups of individual 

 curves illustrating connections and correspondences 

 within each group)] . At end 



VI Map Illustrating the Recession of the Last Ice Sheet 

 from New England and New York, compiled by J. W. 

 Goldthwait. Scale, 1: 1,250,000 At end 



