xx LIST OF PLATES 



I-I.ATE FACING PAGK 



12. A. V-shaped canon cut in an upland recently elevated from the sea, 



San Clemente Island, California 256 



B. A " hogback" at the base of the Bighorn Mountains, Wyoming . 256 



13. A. Precipitous front of the Bryant Glacier outlet of the Greenland 



inland ice . 272 



B. Lateral stream beside the Benedict Glacier outlet, Greenland . 272 



14. View of the margin of the Antarctic continental glacier in Kaiser 



WilhelmLand . 282 



15. A. An Antarctic ice foot with boat party landing . . . .290 

 B. A near view of the front of the Great Boss Barrier, Antarctica . 290 



16. A. Incised topography within the " driftless area " .... 300 

 B. Built-up topography within the glaciated region .... 300 



17. A. Soled glacial bowlders which show differently directed striae upon 



the same facet 306 



B. Perched bowlder upon a striated ledge of different rock type, Bronx 



Park, New York 306 



C. Characteristic knob and basin surface of a moraine . . . 306 



18. A. Fretted upland of the Alps seen from the summit of Mount Blanc 372 

 B. Model of the Malaspina Glacier and the fretted upland above it . 372 



19. A. Contour map of a grooved upland, Bighorn Mountains, Wyoming 372 

 B. Contour map of a fretted upland, Philipsburg Quadrangle, Mon- 

 tana ..... 372 



20. Map of the surface modeled by mountain glaciers in the Sierra Nevadas 



of California 376 



21. A. View of the Harvard Glacier, Alaska, showing the characteristic 



terraces ..... ....... 394 



B. The terminal moraine at the foot of a mountain glacier . . . 394 



22. A. Model of the vicinity of Chicago, showing the position of the 



outlet of the former Lake Chicago 400 



B. Map of Yosemite Falls and its earlier site near Eagle Peak . . 400 



23. A. View of the American Fall at Niagara, showing the accumulation 



of blocks beneath .414 



B. Crystal Lake, a landslide lake in Colorado 414 



24. A. Apparatus for exercise in the preparation of topographic maps . 468 



B. The same apparatus in use for testing the contours of a map . . 468 



C. Modeling apparatus in use . . 468 



