Prehistory
Native Americans have likely been hunting in the Great Smoky Mountains for 14,000 years. Numerous Archaic period (c. 8000–1000 B.C.) artifacts have been found within the national park’s boundaries, including projectile points uncovered along likely animal migration paths. Woodland period (c. 1000 B.C. – 1000 A.D.) sites found within the park contained 2000+-year- old ceramics and evidence of primitive agriculture.
The increasing reliance upon agriculture during the Missossippian period (c. 900–1600 A.D.) lured Native Americans away from the game-rich forests of the Smokies and into the fertile river valleys on the outer fringe of the range. Substantial Mississippian-period villages were uncovered at Citico, Toqua, named after the Cherokee villages that later thrived at these sites along the Little Tennessee River in the 1960s. Fortified Mississippian-period villages have been excavated at the McMahan Indian Mounds in Sevierville and more recently in Townsend.
Most of these villages were part of a minor chiefdom centered on a large village known as Chiaha, which was located on an island now submerged by Douglas Lake. The 1540 expedition of Hernando de Soto and the 1567 expedition of Juan Pardo passed through the French Broad River valley north of the Smokies, both spending a considerable amount of time at Chiaha. The Pardo expedition followed a trail across the flanks of Chilhowee Mountain to the Mississippian-period villages at Chilhowee and Citico, Pardo’s notary called them by their Muskogean names, “Chalahume” and “Satapo”).
History
Geology
Most of the rocks in the Great Smoky Mountains consist of late Precambrain rocks that are part of a formation known as the Ocoee Supergroup. The Ocoee Supergroup consists primarily of slightly metamorphosed sandstone, phyllites, schists and slate. Early Precambrian rocks, which include the oldest rocks in the Smokies, comprise the dominant rock type in the Raven Fork Valley in the Oconaluftee valley, and lower Tuckasegee River between Cherokee and Bryson City. They consist primarily of metamorphic gneiss, granite, and schist. Cambrian sedimentary rocks are found among the outer reaches of the Foothills to the northwest and limestone coves such as Cades Cove.
The Precambrian gneiss and schists, the oldest rocks in the Smokies— formed over a billion years ago from the accumulation of marine sediments and igneous rock in a primordial ocean. In the Late Precambrian period, this ocean expanded, and the more recent Ocoee Supergroup rocks formed from accumulations of the eroding land mass onto the ocean’s continental shelf.
By the end of the Paleozoic era, the ancient ocean had deposited a thick layer of marine sediments which left behind sedimentary rocks such as limestone. During the Ordovician period, the North American and African plates collided, destroying the ancient ocean and initiating the Alleghenian orogeny —the mountain-building epoch that created the Appalachian range. The Mesozoic era saw the rapid erosion of the softer sedimentary rocks from the new mountains, re-exposing the older Ocoee Supergroup formations.
Around 20,000 years ago, subarctic glaciers advanced southward across North America, and although they never reached the Smokies, the advancing glaciers led to
colder annual temperatures and an increase in precipitation throughout the range. Trees were unable to survive at the higher elevations and were replaced by tundra vegetation. Spruce-fir forests occupied the valleys and slopes below approximately 4,950 feet. The persistent freezing and thawing during this period created the large blockfields that are often found at the base of large mountain slopes.
Between 16,500 and 12,500 years ago, the glaciers to the north retreated and annual temperatures rose. The tundra vegetation disappeared, and the spruce-fir forests retreated to the highest elevations. Hardwood trees moved into the region from the coastal plains, replacing the spruce-fir forests in the lower elevations. The temperatures continued warming until around 6,000 years ago, when they began to gradually grow cooler.
Flora
Fauna
Threatened Ecosystem
Air pollution is contributing to increased Red Spruce tree mortality at higher elevations and oak decline at lower elevations, while invasive hemlock wooly adelgids attack Hemlocks and balsam woolly adelgids attack Fraser firs. Pseudoscymnus tsugae, a type of beetle in the ladybug family, Coccinellidae, has been introduced in an attempt to control the pests.
Visibility now is dramatically reduced by smog from both the Southeastern United States and the Midwest, and smog forecasts are prepared daily by the Environmental Protection Agency for both nearby Knoxville TN, and Asheville, North Carolina.
Environmental threats are the concern of many non-profit environmental stewardship groups, especially The Friends of the Smokies. Formed in 1993, the friends group assists the National Park Service in its mission to preserve and protect the Great Smoky Mountains National Park by raising funds and public awareness, and providing volunteers for needed projects.