ILLUSTRATIONS. 



Plate I. Topographic map of Michigan east of eighty-seventh meridian In pocket. 



II. Geologic map of the southern peninsula of Michigan, showing contours of bedrock surface In pocket. 



III. Topographic map of Indiana In pocket. 



IV. Map showing thickness of drift in Indiana In pocket. 



V. Diagrammatic representation of the outline of the ice border at several successive positions and the 



direction of ice movements in connection with each position 62 



VI. Glacial map of Indiana In pocket. 



VII. Glacial map of southern peninsula of Michigan In pocket. 



VIII. Map showing eskers near Mason, Mich 208 



IX. Map showing the Williamston-Dansville esker, Ingham County, Mich 210 



X. Map showing eskers near Webberville, Mich 212 



XI . Map showing eskers near Howell, Mich 214 



XII. Wave erosion of pre-Wisconsin till, Richmondville, Mich. : A, General view; B, Nearer view showing 



pebbles in relief 290 



XIII. A, Old till with soil south of Avoca, Mich.; B, Distant view of the Arkona beach near Fargo, Mich. . 291 



XIV. Map of glacial Lakes Maumee, Saginaw, and Chicago 334 



XV. Map of ice ramparts on the shore of glacial Lake Maumee near Columbus Grove, Ohio In pocket. 



XVI. Map of glacial Lakes Whittlesey, Saginaw, and Chicago 378 



XVII. Map of glacial Lakes Warren and Chicago - 392 



XVIII. Profile of deformed water planes of the early glacial lakes in the eastern half of the Lake Erie basin 



on a line running N. 56° E. from Ashtabula, Ohio 398 



XIX. Map of glacial Lakes Duluth, Chicago, and Lundy (Dana, Elkton) 400 



XX. Profile of warped water planes of glacial lakes on the "thumb " of Michigan and in the southeastern 



part of the State 406 



XXI. Map of glacial Lake Algonquin and its correlatives 410 



XXII. A, The Algonquin beach ridges on the short target range, Mackinac Island; B, Algonquin cliff and 



terrace near Black River, Alcona County, Mich 420 



XXIII. Profile of warped water planes of Lake Algonquin and the Nipissing Great Lakes on the east side of 



Lake Michigan and from Mackinac Island to Sault Ste. Marie, Ontario 430 



XXIV. Profile of warped water planes on the west side of Lake Michigan 430 



XXV. Profile of warped water planes on the east side of Lake Huron in Canada 432 



XXVI. Battlefield beach, Mackinac Island, Mich. : A, Rear view; B, View west along crest of beach 434 



XXVII. Map of Nipissing Great Lakes and correlatives 448 



XXVIII. A, Nipissing beach gravels southeast of Rogers, Mich.; B, Sleeping Bear Point, Leelanau County, 



Mich 450 



XXIX. A, Sugar Loaf Rock, Mackinac Island, Mich.; B, Stack in St. Ignace, Mich.; C, Mackinac Island 



from Round Island, looking northwest 451 



XXX. Arch Rock, Mackinac Island, from the lake 452 



XXXI. Map of the distributaries of Detroit River 488 



XXXII. Map showing moraines and morainic systems in Michigan and Indiana In pocket. 



Figure 1. Map showing relation of Flint and Owosso moraines to the Grand River channel 258 



2. Map of part of drumlin area south and east of Charlevoix, Mich 311 



3. DrumlinsinT. 33 N.. R. 7 W., Charlevoix County, Mich 312 



4. Map showing relation of the second or middle Maumee beach to the Defiance moraine west of Find- 



lay, Ohio 343 



5. Map showing relations of Whittlesey, Arkona, and Warren beaches to one another and to the Port 



Huron morainic system 366 



6. Diagram showing lake stages as affected by glacial oscillations on the "thumb " of Michigan 370 



7. Diagram cf falling stages of lake waters at western end of Lake Erie basin 397 



8. Map showing isobases of Lake Algonquin at its highest stage and isobases of Lake L~oquois as repre- 



sented by Goldthwait 439 



9. Map of the isobases of the Nipissing Great Lakes at the two-outlet stage 461 



10. Map of distributaries, gravelly river bars, the St. Clair esker. and other features near St. Clair, Mich. . 474 



11. Map of St. Clair delta 479 



34407°— 15 2 17 



