r^^ 



CONTENTS 



Learning About the Past 8 



The Calendar of Life 10 



Landscapes of the Past 11 



Setting the Modern Scene 14 



Shifting Climates 16 



Formation of the Dunesland 18 



Recolonization After the Glaciers 19 



Spread of Temperate Deciduous Life 24 



Extinct Life 25 



The Dunesland as a Heritage 26 



Scientific Equivalents of Common Names Cited 27 



Useful References 28 



Illustrations in this publication should he credited as follows: William E. Clark, 

 fig. 16; Carl O. Dunbar, fig. 10 (left); Theodore H. Frison, fig. 15; Frank Caleb 

 Gates, frontispiece; Illinois State Museum, fig. 8; Carl O. Mohr, figs. 10 (right) and 

 H; Mrs. Alice Ann Prickett, figs. 4, 9, and 11; Herbert H. Ross, figs. 2, 5, and 12; 

 University of Illinois, fig. 13; Miss Marguerite Verley, fig. 1; Wilmer D. Zehr, 

 cover and figs. 3, 6, and 7. 



Printed by authorify of the State of Illinois, IRS Ch. 127, Por. 58.12. 



