Table 3. Ecoregional distribution of landforms.
| Area | Summit | Upper slope | Lower slope | Valley bottom | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LCC | (km2) | Peak/ridge warm | Peak/ridge neutral | Peak/ridge cool | Mtn/divide | Cliff | Warm | Neutral | Cool | Flat | Warm | Neutral | Cool | Flat | Valley | Narrow |
| North Pacific | 179,408 | 0.369 | 2.885 | 0.100 | 0.278 | 0.027 | 10.02 | 27.98 | 2.79 | 2.80 | 11.20 | 24.61 | 1.61 | 5.77 | 8.33 | 1.23 |
| California | 210,173 | 1.046 | 1.384 | 0.007 | 0.125 | 0.039 | 18.21 | 13.32 | 0.34 | 9.21 | 21.17 | 10.00 | 0.22 | 16.81 | 7.38 | 0.74 |
| Great Northern | 660,379 | 0.124 | 1.791 | 0.098 | 0.245 | 0.087 | 6.48 | 30.04 | 2.92 | 4.89 | 7.43 | 27.12 | 1.85 | 8.83 | 7.18 | 0.92 |
| Great Basin | 562,700 | 0.319 | 1.133 | 0.009 | 0.070 | 0.010 | 8.49 | 17.12 | 0.35 | 9.90 | 13.34 | 17.68 | 0.15 | 26.63 | 4.43 | 0.36 |
| Gulf Coast Prairie | 382,730 | 0.141 | 0.015 | 0.000 | 0.000 | 0.000 | 12.10 | 0.11 | 0.00 | 34.28 | 9.28 | 0.04 | 0.00 | 34.07 | 9.20 | 0.76 |
| Southern Rockies | 516,755 | 0.645 | 1.136 | 0.016 | 0.103 | 0.148 | 21.34 | 14.85 | 0.47 | 7.29 | 22.17 | 11.75 | 0.23 | 12.51 | 6.48 | 0.86 |
| Plains and Prairie Potholes | 783,896 | 0.008 | 0.265 | 0.002 | 0.001 | 0.000 | 0.44 | 20.34 | 0.02 | 25.21 | 0.57 | 15.93 | 0.01 | 27.38 | 9.00 | 0.82 |
| Great Plains | 782,004 | 0.041 | 0.054 | 0.000 | 0.000 | 0.000 | 7.44 | 6.12 | 0.00 | 34.42 | 6.44 | 3.87 | 0.00 | 32.90 | 7.77 | 0.93 |
| Upper Midwest & Great Lakes | 540,064 | 0.011 | 0.226 | 0.000 | 0.001 | 0.000 | 0.88 | 15.70 | 0.00 | 28.55 | 0.90 | 10.22 | 0.00 | 32.85 | 9.44 | 1.20 |
| Eastern T. Prairie & Big Rivers | 535,630 | 0.010 | 0.026 | 0.000 | 0.000 | 0.000 | 6.30 | 11.15 | 0.00 | 31.46 | 5.41 | 6.06 | 0.00 | 28.30 | 9.84 | 1.45 |
| Gulf Coast Prairie | 382,730 | 0.141 | 0.015 | 0.000 | 0.000 | 0.000 | 12.10 | 0.11 | 0.00 | 34.28 | 9.28 | 0.04 | 0.00 | 34.07 | 9.20 | 0.76 |
| Gulf Coastal Plains and Ozarks | 728,639 | 0.234 | 0.150 | 0.000 | 0.000 | 0.000 | 20.66 | 2.12 | 0.00 | 22.17 | 14.30 | 1.07 | 0.00 | 26.98 | 10.71 | 1.61 |
| Appalachian | 592,906 | 1.007 | 2.061 | 0.001 | 0.007 | 0.000 | 22.80 | 17.66 | 0.06 | 4.36 | 20.20 | 11.45 | 0.02 | 6.81 | 11.08 | 2.50 |
| North Atlantic | 289,740 | 0.146 | 1.127 | 0.006 | 0.009 | 0.000 | 8.01 | 23.51 | 0.10 | 13.02 | 6.96 | 20.53 | 0.02 | 16.52 | 8.80 | 1.24 |
| South Atlantic | 357,847 | 0.060 | 0.041 | 0.000 | 0.000 | 0.000 | 18.96 | 0.45 | 0.00 | 29.80 | 13.38 | 0.20 | 0.00 | 24.91 | 10.08 | 2.12 |
| Peninsular Florida | 93,383 | 0.002 | 0.000 | 0.000 | 0.001 | 0.000 | 0.73 | 0.00 | 0.00 | 43.81 | 0.36 | 0.00 | 0.00 | 44.48 | 9.59 | 1.04 |
This table shows the percentage of each landform class in the conterminous USA by Landscape Conservation Cooperative ecoregions (LCC).