Fig. I. — Retreatal Stages in Stoughton Bay of Glacial Lake Neponset. 

 I Rock and till, generally higher than "high-level" plains. 



1 High-level plains and outwash of East Sharon and Stoughton lakelets. 



^^ Gradation deposits between high- and low-level plains. 



[Jll Low-level plains and outwash of Elm Street and West Stoughton lakelets 

 Ijjjll Gradation deposits below low-level plains. 



IS^^S^ Ice-masses at close of low-level stage of lakelets. 



._.^/' Position of ice-margin at opening of high-level stage. 



^^.•' Position of ice-margin at close of high-level stage. 



^■^^*^» Position of ice-margin at close of low-level stage. 



