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LIST OF ILLUSTRATIONS.

FIG.

1. Zermatt Glacier

2. Formation of veined structure

3, 4. Formation of marginal fissures and veins

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6. Section across glacial valley, showing old lateral moraines 7. Mont Blanc glacier region

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16. Diagram showing the character of glacial motion

17. Line of most rapid glacial motion

18. Diagram showing retardation of the bottom of a glacier

19. Bed-rock scored with glacial marks

20. Scratched stone from the till of Boston

21. Typical section of till in Seattle, Wash.

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22. Ideal section showing how the till overlies the stratified

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25. Conglomerate boulder found in Boone County, Ky.

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27. Drumlins in Goffstown, N. H.

28. Map of drumlins in the vicinity of Boston

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FIG.

31. Longitudinal kames near Hingham, Mass..

32. Map showing the kames of Maine and southeastern New

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33. Western face of the Kettle Moraine near Eagle, Wis.

34. Section of the east-and-west glacial furrows on Kelly's

Island

35. Same as the preceding

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41. Maps showing lines of débris extending from the Alps into the plains of the Po.

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42. Section of the Cefn Cave

43. Map showing moraine between Speeton and Flamborough 156 44, Diagram-section near Cromer

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45. Section through the westerly chalk bluff at Trimingham,

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48. Enlarged section of the shelly sand and surrounding clay

at B in preceding figure

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49. Map showing the glaciated area of Europe.

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50. Map showing old channel and mouth of the Hudson

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51. New York Harbor in preglacial times.

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52. Section across the valley of the Cuyahoga River.

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62. Parallel roads of Glen Roy

53. Map of Mississippi River from Fort Snelling to Minneapolis

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54. Map showing the effect of the glacial dam at Cincinnati 55. Map of Lake Erie-Ontario

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57. Section of the lake ridges near Sandusky, Ohio

58. Map showing stages of recession of the ice in Minnesota

59. Glacial terrace on Raccoon Creek, in Ohio
60. Ideal section across a river-bed in drift region
61. Map of Lakes Bonneville and Lahontan

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63. Map showing glacial terraces on the Delaware and Schuyl

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kill Rivers

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FIG.

64. Palæolith found by Abbott in New Jersey .

65. Section across the Delaware River at Trenton, N. J. 66. Section of the Trenton gravel

67. Face view of argillite implement found by Dr. C. C. Abbott in 1876

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68. Argillite implement found by Dr. C. C. Abbott, March,

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69. Chipped pebble of black chert found by Dr. C. L. Metz, October, 1885

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70. Map showing glaciated area in Ohio

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71. Palæoliths from Newcomerstown and Amiens (face view) 72. Edge view of the preceding .

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73. Section across the Mississippi Valley at Little Falls, Minn. 74. Quartz implement found by Miss F. E. Babbitt, 1878, at

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75. Argillite implement found by H. T. Cresson, 1887
76. General view of Baltimore and Ohio Railroad cut, near

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94. Section across Table Mountain, Tuolumne County, Cal. 95. Calaveras skull

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96. Three views of Nampa image, drawn to scale

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97. Map showing Pocatello, Nampa, and the valley of Snake

River

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FIG.

PAGE

98. Section across the channel of the Stanislaus River 99. Diagram showing effect of precession

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100. Map showing course of currents in the Atlantic Ocean 101. Map showing how the land clusters about the north pole. 102. Diagram showing oscillations of land-surface and icesurface during the Glacial epoch

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103. Diagram of eccentricity and precession
104. Map of the Niagara River below the Falls
105. Section of strata along the Niagara Gorge.

106. Map showing the recession of the Horseshoe Falls since
1842

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107. Section of kettle-hole near Pomp's Pond, Andover, Mass. 345 108. Flint-flakes collected by Abbé Bourgeois .

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MAPS.

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TO FACE PAGE

Frontispiece.

Contour and glacial map of the British Isles
Map showing the glacial geology of the United States
Map of glacial movements in France and Switzerland

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