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The range is older than the other major mountain range in North America, the Rocky Mountains of the west. Some of the outcrops in the Appalachians contain rocks formed during the Precambrian era. The geologic processes that led to the formation of the Appalachian Mountains started 1.1 billion years ago.
The US uses the term Appalachian Highlands, and Canada uses the term Appalachian Uplands, to define contiguous regions that have similar geology, topography, history, and native plant and animal communities. (The Appalachian Mountains are not synonymous with the Appalachian Plateau, which is one of the provinces of the Appalachian Highlands).
The Great Smoky Mountains are particularly rich in biodiversity. The Appalachians are home to 158 different species of tree, more than anywhere else in North America. There are two main types of forest: deciduous oak forest at low elevations (between 250m and 1350m), and coniferous spruce-fir forest above that.
Blue Ridge Mountains - Front Royal, Virginia Although the term "Blue Ridge" is sometimes applied exclusively to the eastern edge or front range of the Appalachian Mountains, the geological definition of the Blue Ridge province extends westward to the Ridge and Valley area, encompassing the Great Smoky Mountains, the Great Balsams, the Roans, the Blacks, and other mountain ranges.
The rocks of the Appalachian, Ouachita, Ozark Mountains are old and share a common origin. They largely consist of sedimentary rocks of Paleozoic age that were deposited on the sea floor and are presently folded and faulted. The Appalachians also have volcanic rocks and slivers of ancient sea floor. [18]
When Smoky Mountains Hiking Club first started, the park whose namesake it shares was still just an idea. 100-year-old Smoky Mountains Hiking Club is older than the park | Word from the Smokies ...
Atlanta got more than 11 inches of rain, more than any 48-hour period in recorded history. So many trees were toppled in South Carolina that more than 40 percent of the state lost electricity at ...
During most of the Late Cretaceous (100.5 to 66 million years ago) the eastern half of North America formed Appalachia (named for the Appalachian Mountains), an island land mass separated from Laramidia to the west by the Western Interior Seaway. This seaway had split North America into two massive landmasses due to a multitude of factors such ...