CONTENTS. XV 



Chatter XIX. — The Champlain period — Continued. Page. 

 The Connecticut River lakes— Continued. 



The Hadley Lake gvg 



The north end of the lake in Greeniield and the ihannel of connection with the main 



valley 629 



The Green River glacier g30 



The Factory Village channel 632 



The high terrace plains in the south of Greenfield and the north of Deerfield 632 



The lake bench from Deerfield River south (J34 



The Deerfield delta 631 



The West Brook delta 63,5 



The Mill River delta in Northampton 637 



The lake bench on the east side of Hadley Lake in Leverett and Amherst 639 



The delta of Cushmans Brook at North Amherst and the isolation of the East 



Street basin in Amherst 640 



The bench surrounding the East Street basin 641 



Shore notches in the sides of drumlins 612 



The high terrace or bench along the west side of the Amherst ridge 644 



The bench around Mount Warner 648 



The bench along the north slope of the Mouut Holyoke and Mount Tom range 649 



The Westfield plain 650 



The greater elevation of the terraces in the W^estfield than in the Springfield Lake ; 



possible western elevation 654 



Geology of Westfield and vicinity, by J. S. Diller 654 



The S])ringfield Lake 657 



The "gorge terrace" of Dry Brook Hill in the north part of South Hadley 661 



The high terrace of the west side of the river from the Holyoke notch southward . . 662 



The similarity of the Belcherto wn notch to the notch east of Mount Toby 663 



The moraine across the southern part of the Granby plain 664 



Kettle holes and the old bed of the Connecticut 664 



Kettle holes and the structure of the high-terrace sands ; their origin from the melting 



of ice beneath the terrace gravels 665 



Lake bottoms 672 



The Montague Lake 672 



The Hadley Lake 673 



The Springfield Lake 677 



Detailed sections of terraces and lake bottoms, showing several advances of the ice 



front 677 



The Camp Meeting cutting 677 



Section of clays in Hatfield, showing great disturbance and pressure cleavage 691 



The Wapping cutting 695 



Chapter XX. — The Champlain period (Continued) 697 



The Champlain clays 697 



Introduction 697 



The Montague Lake 697 



The Hadley Lake 698 



The Springfield Lake 701 



Contact of the clays upon the till 701 



