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Copper Basin (Tennessee)
The Copper Basin, also known as the Ducktown Basin, is a geological region located primarily in Polk County, Tennessee that contains deposits of copper ore and covers approximately 60,000 acres (24,000 hectares). Located in the southeastern corner of Tennessee, small portions of the basin extend into Fannin County, Georgia and Cherokee County, North Carolina. The basin is surrounded by the Cherokee National Forest and the cities of Ducktown and Copperhill, Tennessee and McCaysville, Georgia are located in the basin. Copper was first discovered in the basin in 1843, and by the 1850s large mining operations, spearheaded by German-born businessman Julius Eckhardt Raht, were taking place. The mines were seized by the Confederacy during the American Civil War and were the source of about 90% of the copper used by the Confederate Army. After the Civil War, smelting operations, which were used to separate sulfur from the copper ore, resulted in acid rain in the area, and, combined wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Ordovician
The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period million years ago (Mya) to the start of the Silurian Period Mya. The Ordovician, named after the Welsh tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in North Wales in the Cambrian and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed strata were different from those of either the Cambrian or the Silurian systems, and placed them in a system of their own. The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official period of the Paleozoic Era by the International Geological Congress. Life continued to flourish during the Ordovician as it did in the earlier Cambrian Pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cherokee County, North Carolina
Cherokee County is the westernmost county in the U.S. state of North Carolina. It borders Tennessee to its west and Georgia to its south. As of the 2020 census, the population was 28,774. The county seat is Murphy, elevation 1604 ft. History This area was occupied for thousands of years by indigenous peoples who settled in the river valleys. It was part of the historic Cherokee homelands, a large territory composed of areas of what are now western Virginia, western North and South Carolina, eastern Tennessee, and northeastern Georgia. The county was formed in 1839 from the western part of Macon County in the year that the United States removed most of the Cherokee from the Southeast on what became known as the Trail of Tears. The county was named for the Cherokee Native Americans. It is near the Qualla Boundary, now lands of the federally recognized Eastern Band of Cherokee Indians. This is the only such recognized tribe in North Carolina. The tribe is primarily composed o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fannin County, Georgia
Fannin County is a county located in the north central portion of the U.S. state of Georgia. As of the 2020 census, the population was 25,319. It is one of the most rural counties in Georgia due its location in the Appalachian Mountain Range, with about 90% of the population of Fannin County living in unincorporated lands. The county seat is Blue Ridge. The county was created on January 21, 1854 and is named after James Fannin, a veteran who fought in the Texas Revolution. History Prior to European colonization, the area that is now Fannin County was inhabited by the Cherokee people and other Indigenous peoples for thousands of years. Fannin County was founded on January 12, 1854, taken from 396 square miles that were previously part of Gilmer and Union counties. The county is named for Georgia native James W. Fannin, who fought and died during the Texas Revolution. Although the county was majority pro-secession at the beginning of the Civil War, wartime conditions inspi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polk County, Tennessee
Polk County is a county located in the southeastern corner of the U.S. state of Tennessee. As of the 2020 United States census, its population was 17,544. Its county seat is Benton. The county was created on November 28, 1839, from parts of Bradley and McMinn counties, after final removal of most Cherokee from the region that year. The county was named after then-governor (and future president) James K. Polk. Polk County is included in the Cleveland, Tennessee Metropolitan Area Statistical Area, which is also included in the Chattanooga–Cleveland–Dalton, TN–GA–AL Combined Statistical Area. History Prior to the settlement of the Europeans, Polk County was inhabited by the Cherokee, and before them, thousands of years of indigenous cultures. The portion of Polk County north of the Hiwassee River was ceded by the Cherokee Nation to the US in the Calhoun Treaty of 1819. The rest of the county was part of the Ocoee District. The Cherokee were forcibly removed from here ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burra Burra Mine (Tennessee)
The Burra Burra Mine is a copper mine located in Ducktown, Tennessee, in the southeastern United States. Named for the famous mine in Australia, the Burra Burra Mine is located in the Copper Basin geological region, and extracted over 15 million tons (14 million metric tons) of copper ore during its 60 years of operation between 1899 and 1959. The mine's remaining structures are listed on the National Register of Historic Places as part of the Burra Burra Mine Historic District. The site is also home to the Ducktown Basin Museum, and the museum and mine are a Tennessee State Historic Site operated in partnership with the Tennessee Historical Commission. The Burra Burra Mine was one of a number of mining operations in the Copper Basin from 1850 to 1987 that produced substantial amounts of copper ore that contained sulfur. Trees were cut to smelt the ore and burn off the sulfur. Both the tree-harvesting and the sulfuric acid pollution left more than —(— of the basin eroded a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial.Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC The Holocene corresponds with the rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleozoic
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ''zōḗ'' (), "life", meaning "ancient life" ). It is the longest of the Phanerozoic eras, lasting from , and is subdivided into six geologic periods (from oldest to youngest): # Cambrian # Ordovician # Silurian # Devonian # Carboniferous # Permian The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Arthropods, molluscs, fish, amphibians, reptiles, and synapsids all evolved during the Paleozoic. Life began in the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alleghenian Orogeny
The Alleghanian orogeny or Appalachian orogeny is one of the geological mountain-forming events that formed the Appalachian Mountains and Allegheny Mountains. The term and spelling Alleghany orogeny was originally proposed by H.P. Woodward in 1957. The Alleghanian orogeny occurred approximately 325 million to 260 million years ago over at least five deformation events in the Carboniferous to Permian period. The orogeny was caused by Africa's collision with North America. At the time, these continents did not exist in their current forms: North America was part of the Euramerica super-continent, while Africa was part of Gondwana. This collision formed the super-continent Pangaea, which contained all major continental land masses. The collision provoked the orogeny: it exerted massive stress on what is today the Eastern Seaboard of North America, forming a wide and high mountain chain. Evidence for the Alleghanian orogeny stretches for many hundreds of miles on the surface from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hercynian Orogeny
The Variscan or Hercynian orogeny was a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laurussia) and Gondwana to form the supercontinent of Pangaea. Nomenclature The name ''Variscan'', comes from the Medieval Latin name for the district '' Variscia'', the home of a Germanic tribe, the Varisci; Eduard Suess, professor of geology at the University of Vienna, coined the term in 1880. (Variscite, a rare green mineral first discovered in the Vogtland district of Saxony in Germany, which is in the Variscan belt, has the same etymology.) ''Hercynian'', on the other hand, derives from the Hercynian Forest. Both words were descriptive terms of strike directions observed by geologists in the field, ''variscan'' for southwest to northeast, ''hercynian'' for northwest to southeast. The ''variscan'' direction reflected the direction of ancient fold belts cropping out throughout Germany and adjacent countries and the meaning shifted from d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
