Tectonic Evolution of Western North America |
 |
| ca. 10 MYA - Recent |
| When thicker crust of the Colorado Plateau and the Rockies platform reached the zone of upwelling mantle, it responded by uplifting rather than fracturing. |
Tectonic Evolution of Western North America |
|
| ca. 10 MYA - Recent |
| When thicker crust of the Colorado Plateau and the Rockies platform reached the zone of upwelling mantle, it responded by uplifting rather than fracturing. |