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Tectonic Provinces of the Southern Appalachian Mountains
National Park Service sites in the Appalachian Mountains have rocks and landscapes resulting from collision of North America with accreted terranes and the ancient continent of Gondwanaland.
Greater Pacific Northwest—Three Types of Plate Boundaries and a Hotspo...
The Yellowstone Hotspot track is superimposed on other tectonic provinces of the Pacific Northwest. The hotspot first surfaced 17 million years ago as massive outpourings of fluid basalt lava in the Columbia Pl... More