ILLUSTRATIONS. 



Plate I. Topographic map of area discussed 22 



II. Glacial map of area discussed 50 



III. Pleistocene map of the district between Niagara River and Rochester, N. Y 68 



IV. The Olean, N. Y. , topographic sheet In pocket. 



V. Topographic map showing drainage 'features near Cincinnati, Ohio 84 



VI. The Owensboro, Ky., topographic sheet In pocket. 



VII. Topographic map showing drainage features near Ironton, Ohio 106 



VIII. Map showing change of drainage near Franklin, Pa 136 



IX. A, Middle Falls of Genesee River at Portage, N. Y.;.£, Genesee River Canyon below 



Middle Falls 202 



X. Middle and Lower falls of Genesee River at Rochester, N. Y 204 



XI. Map of the Maumee-Miami glacial lobe 304 



XII. A, Section of till at Lane's mill, near Darrtown, Ohio; B, Exposure of till some miles 



east of Lane's mill section 330 



XIII. Map of the Scioto glacial lobe 340 



XIV. A, Section of peat and till near Germantown, Ohio; B, Section showing wood mcluded 



in till 1 mile south of Oxford, Ohio 364 



XV. Map of the Grand River glacial lobe 436 



XVI. A, Gravel pit at Fort Wayne, Ind. ; '£, Near view of part of same gravel pit 578 



XVII. A, Glaciated surface on Middle Bass Island, in Lake Er'ie; B, Large glacial groove on 



Marblehead Peninsula, near Lakeside, Ohio 608 



XVIII. Pleistocene map of part of the Girard and Erie, Pa., quadrangles 652 



XIX. Pleistocene map of parts of the Dunkirk, Cherry Creek, and Silver Creek, N. Y., 



quadrangles 654 



XX. Map of first Lake Maumee 710 



XXI. Map of Lake Maumee at its greatest expansion ■ 714 



XXII. Map of beaches near Sandusky, Ohio 730 



XXIII. Map of Lake Whittlesey 740 



XXIV. Map of the Behnore Beach of Defiance Bay and Lake Whittlesey near Defiance, Ohio. 748 

 XXV. Pleistocene features near eastern terminus of the Belmore beach southeast of Buffalo, 



N.Y 754 



XXVI. Map of Lake Warren _ 758 



Fig. 1. Probable jireglacial drainage of the Upper Ohio region 89 



2. The Upper Ohio drainage near the supposed old divide 90 



3. The Old Kanawha drainage in southern Ohio 101 



4. Relation between the present stream bed and the rock floor along the preglacial Upper 



Allegheny River 130 



5. Present drainage of part of the Middle Allegheny 134 



6. Probable preglacial drainage of part of the Middle Allegheny 135 



7. Profile along the Low Grade Division of the Allegheny Valley Railroad 147 



8. Hydrography of the Genesee Valley 201 



15 



