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Elizabeth Mine
The Elizabeth Mine was a copper mine located on the town line between the Town of Strafford and the Town of Thetford, in Orange County, Vermont. The ore deposit was discovered in 1793, but mining did not start until 1809. Open pit mining and from 1886 underground mining was conducted. The mine produced up to of copper (1954) and was closed in 1957. Due to acid mine drainage the west branch of the Ompompanoosuc River was polluted. Since 2000 the Environmental Protection Agency (EPA) and the Vermont Agency of Natural Resources have been developing a plan to clean up the area. Geology The ore deposits at the Elizabeth Mine represent classic examples of sedimentary exhalative type deposition where hydrothermal fluids enter the marine environment and precipitate out minerals in a strataform ore body. The ores are hosted in the strongly deformed Lower Devonian Gile Mountain Formation (a grey to dark grey mica schist). The ore body at the Elizabeth Mine is a massive sulfide deposit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strafford, Vermont
Strafford is a town in Orange County, Vermont, Orange County, Vermont, United States. The population was 1,094 at the 2020 United States Census, 2020 census. The town of Strafford was created on August 12, 1761 by way of a royal charter which King George III of Great Britain issued to Governor Benning Wentworth of New Hampshire. The town was named after the Earl of Strafford. Its town house is one of the most famous in Vermont, sitting atop a hill in the historic town square. Strafford was one of thirteen Vermont towns isolated by flooding caused by Hurricane Irene (2011), Hurricane Irene in 2011. Geography According to the United States Census Bureau, the town has a total area of 44.3 square miles (114.8 km2), of which 44.2 square miles (114.5 km2) is land and 0.1 square mile (0.3 km2) (0.25%) is water. The West Branch of the Ompompanoosuc River flows through the town.DeLorme (1996). ''Vermont Atlas & Gazetteer''. Yarmouth, Maine: DeLorme. Dem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schist
Schist ( ) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture (geology), texture reflects a high content of platy minerals, such as micas, talc, chlorite group, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz. Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium Metamorphism#Metamorphic grades, grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a ''mica schist''). Where the type of the original rock (the protolith) is discernible, the schist is us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superfund Sites In Vermont
Superfund is a United States federal environmental remediation program established by the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA). The program is administered by the Environmental Protection Agency (EPA). The program is designed to investigate and clean up sites contaminated with hazardous substances. Sites managed under this program are referred to as "Superfund" sites. There are 40,000 federal Superfund sites across the country, and approximately 1,300 of those sites have been listed on the National Priorities List (NPL). Sites on the NPL are considered the most highly contaminated and undergo longer-term remedial investigation and remedial action (cleanups). The EPA seeks to identify parties responsible for hazardous substances released to the environment (polluters) and either compel them to clean up the sites, or it may undertake the cleanup on its own using the Superfund (a trust fund) and seek to recover those costs from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historic American Engineering Record In Vermont
History (derived ) is the systematic study and the documentation of the human activity Human behavior is the potential and expressed capacity ( mentally, physically, and socially) of human individuals or groups to respond to internal and external stimuli throughout their life. Kagan, Jerome, Marc H. Bornstein, and Richard M. L .... The time period of event before the History of writing#Inventions of writing, invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well as the memory, discovery, collection, organization, presentation, and interpretation of these events. Historians seek knowledge of the past using historical sources such as written documents, oral accounts, art and material artifacts, and ecological markers. History is not complete and still has debatable mysteries. History is also an Discipline (academia), academic discipline which uses narrative to describe, examine, question, and analyze past even ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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