LIST OF ILLUSTRATIONS 



Bold 



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Headlands on Lake Superior Frontispiece 



Chapter I 



I. — Eroding Clay Bluffs on the Shore of Lake Michigan with 



Vegetation Sliding Down into Lake .... 

 2. — Serried Ranks of Billows, Lake Superior Shore . 



lO 



II 



12 



13 

 14 



15 

 16 



17 

 18 



19 



— A Stream Cutting Its Banks 



— A Mountain Torrent in Its Narrow Valley . 



— The Beginnings of a Ravine near Glencoe . 



— A Deep V-Shaped Ravine near Fort Sheridan . 



— The Dalles of the Wisconsin River .... 



— ^The Valley of the Illinois at Starved Rock . 



— ^A Narrow Rock Ravine Ending in a Waterfall at Starved 



Rock 



— The Glacier, a Stream of Ice, Canadian Rockies 



— Clay Pinnacles, Rainwashed, near Lakeside, Michigan — 



Inset, Near View of Pinnacles . . ... 

 — Talus at Foot of Cliff and Outwash from the Hills . 

 — A Hill of Sand Moving Inland, South End of Lake ^Michigan 



— ^A Blow-out in the Dunes 



— A Filling Pond 



— A Flood Plain Where Deposits Occur Annually, Salt Creek 



near Brookfield 



— Up-Arched Rock Strata, Pennsylvania 



— ^Lava Outflow Forming Great Areas of Rock 



— The Terminal IMoraine of a Glacier .... 



Chapter II 



PAGE 

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3 



4 



5 



5 

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7 

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9 

 Q 



10 

 12 



13 

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15 



15 

 iS 



19 

 19 



-M 



20. — Cafion Diablo 



21. — ^A Spiral Nebula 



22. — Diagrammatic Section of the Earth 26 



Chapter III 



23. —The Quarries of Stony Island Showing Opposite Inclina- 

 tion of Strata 37 



24.— Diagram of Rock Strata Found in Deep Boring at Lock- 

 port, Illinois 3'^ 



xiii 



