LIST OF PLATES 



FACES PAGE 



I. DUNES IN CONTOUR 20 



II. STREAMS DISAPPEARING IN SAND, GRAVEL, ETC., IN AN ARID REGION 21 



III. YOUTHFUL VALLEYS, SHORE OF LAKE MICHIGAN 36 



IV. THE WIDENING OF A RIVER VALLEY BY MEANDERING OF THE STREAM 37 

 V. YOUTHFUL VALLEYS IN A REGION OF SLIGHT RELIEF AND OF GREAT 



RELIEF 68 



VI. FIG i. TOPOGRAPHIC MATURITY 



FIG 2. IRREGULARITIES OF COAST DEVELOPED BY EROSION AND 



DEPOSITION 69 



VII. TOPOGRAPHIC OLD AGE 84 



VIII. CUSHETUNK AND ROUND MOUNTAINS, N. J 85 



IX. FIG. i. ENTRENCHED MEANDERS. CONODOGUINET CREEK, PA. 

 FIG. 2. SECTION OF THE CALIFORNIA COAST AT OCEANSIDE, 



SHOWING CHANGES OF LEVEL OF THE LAND 100 



X. ALLUVIAL FAN AT THE BASE OF MOUNTAINS. CUCAMONGA, CAL. 101 



XI. THE ALLUVIAL PLAIN OF THE MISSOURI AND BIG Sioux; S. DAK. 116 



XII. GLACIERS OF GLACIER PEAK, WASH 117 



XIII. GLACIERS AND CIRQUES OF THE BIGHORN MOUNTAINS . . . 164 



XW. AN ILL-DRAINED PLAIN OF GLACIAL DRIFT; SOUTHERN WISCONSIN 165 

 XV. FIG. i. SHORE-LINE or MARTHAS VINEYARD, MASS. 



FIG. 2. LAND-TIED ISLAND 180 



XVI. THE UPPER END OF SENECA LAKE, N. Y. . . <i . . . . 181 



XI 



