Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Great Appalachian Valley  | |
|---|---|
| BT | North America |
| .Appalachians | |
| ..Great Appalachian Valley | |
| RT | Shenandoah Valley |
| Saint Lawrence Lowlands | |
| Champlain Valley | |
| Saint Lawrence Valley | |
| Hudson Valley | |
| Tennessee Valley | |
| Valley and Ridge Province | |
| SN | A longitudinal chain of lowlands of the Appalachians extending from Canada on NE to Alabama on SW. Before 1977, also search Great Valley. |