Illustration 5 - Physiographic Province Map - Continental United States

1946 – prepared by Nevin M. Fenneman and USGS

LEGEND 1. SUPERIOR UPLAND 2. CONTINENTAL SHELF 3. COASTAL PLAIN 4. PIEDMONT 5. BLUE RIDGE 6. VALLEY AND RIDGE 7. ST LAWRENCE VALLEY 8. APPALACHIAN PLATEAUS 9. NEW ENGLAND 10. ADIRONDACK 11. INTERIOR LOW PLATEAUS 12. CENTRAL LOWLAND 13. GREAT PLAINS 14. OZARK PLATEAUS 15. OUACHITA 16. SOUTHERN ROCKY MTNS 17. WYOMING BASIN 18. MIDDLE ROCKY MTNS 19. NORTHERN ROCKY MTNS 20. COLUMBIA PLATEAUS 21. COLORADO PLATEAUS 22. BASIN AND RANGE 23. CASCADE – SIERRA MTNS 24. PACIFIC BORDER 25. LOWER CALIFORNIA

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Illustration 6 - Physiographic Province Map – Alaska

USGS PAPER NO. 482. CLYDE WAHRAFTIG

LEGEND 1. ARCTIC COASTAL PLAIN 2. ARCTIC FOOTHILLS 3. ARCTIC MOUNTAINS 4. NORTHERN PLATEAUS 5. WESTERN ALASKA 6. SEWARD PENINSULA 7. BERING SHELF 8. AHKLUN MOUNTAINS 9. ALASKA – ALUTIAN 10. COASTAL TROUGH 11. PACIFIC BORDER RANGES 12. COAST MOUNTAINS