XVI CONTENTS 



PAQB 



ice The grinding mill beneath the ice The lifting of the grinding 

 tools and their incorporation within the ice Melting upon the glacier 

 margins in Greenland The marginal moraines The outwash plain 

 or apron The continental glacier of Antarctica Nourishment of 

 continental glaciers The glacier broom Field and pack ice The 

 drift of the pack The Antarctic shelf ice Icebergs and snowbergs 

 and the manner of their birth Reading references .... 271 



CHAPTER XXII 

 THE CONTINENTAL GLACIERS OF THE " ICE AGE" 



Earlier cycles of glaciation Contrast of the glaciated and nonglaciated 

 regions The "driftless area" Characteristics of the glaciated 

 regions The glacier gravings Younger records over older : the 

 glacier palimpsest The dispersion of the drift The diamonds of 

 the drift Tabulated comparison of the glaciated and nonglaciated 

 regions Unassorted and assorted drift Features into which the 

 drift is molded Marginal or "kettle" moraines Outwash plains 

 Pitted plains and interlobate moraines Eskers Drumlins The 

 shelf ice of the ice age Character profiles 297 



CHAPTER XXIII 

 GLACIAL LAKES WHICH MARKED THE DECLINE OP THE LAST ICE AGE 



Interference of glaciers with drainage Temporary lakes due to ice block- 

 ing The "parallel roads" of the Scottish glens The glacial Lake 

 Agassiz Episodes of the glacial lake history within the St. Lawrence 

 Valley The crescentic lakes of the earlier stages The early Lake 

 Maumee The later Lake Maumee Lakes Arkona and Whittlesey 

 Lake Warren Lakes Iroquois and Algonquin The Nipissing 

 Great Lakes Summary of lake stages Permanent changes of 

 drainage effected by the glacier Glacial Lake Ojibway in the Hud- 

 son's Bay drainage basin Reading references 320 



CHAPTER XXIV 

 THE UPTILT OP THE LAND AT THE CLOSE OP THE ICE AGE 



The response of the earth's shell to its ice mantle The abandoned strands 

 as they appear to-day The records of uplift about Mackinac Island 

 -The present inclinations of the uplifted strands The hinge lines of 

 uptilt Future consequences of the continued uptilt within the lake 

 region Gilbert's prophecy of a future outlet of the Great Lakes to 

 the Mississippi Geological evidences of continued uplift Drowning 

 of southwestern shores of Lakes Superior and Erie Reading refer- 

 ences 340 



