Holston Formation: Difference between revisions
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The '''Holston [[Geologic formation|Formation]]''', alternately known as the '''Holston Limestone''', is a [[stratigraphic]] [[geologic unit|unit]] of [[Ordovician]] age within the [[Chickamauga Group]] in the [[Ridge-and-valley Appalachians|Ridge-and-Valley physiographic province]] of the southeastern [[United States]]. A {{convert|120|mi|km|adj=on}} long [[outcrop]] belt of the Holston in [[East Tennessee]] is the source of the decorative building stone known as [[Tennessee marble]]. |
The '''Holston [[Geologic formation|Formation]]''', alternately known as the '''Holston Limestone''', is a [[stratigraphic]] [[geologic unit|unit]] of [[Ordovician]] age within the [[Chickamauga Group]] in the [[Ridge-and-valley Appalachians|Ridge-and-Valley physiographic province]] of the southeastern [[United States]]. A {{convert|120|mi|km|adj=on}} long [[outcrop]] belt of the Holston in [[East Tennessee]] is the source of the decorative building stone known as [[Tennessee marble]]. |
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its made of some rock like thing. |
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Near [[Knoxville, Tennessee|Knoxville]] the Holston Formation is about {{convert|400|ft|m}} thick but it thins toward the southwest; near [[Cleveland, Tennessee]] it is only 200 feet thick. The [[rock (geology)|rock]] that is quarried for marble is a highly pure (97% CaCO<sub>3</sub>) [[crystalline]] [[limestone]], pink to cedar-red in color. |
Near [[Knoxville, Tennessee|Knoxville]] the Holston Formation is about {{convert|400|ft|m}} thick but it thins toward the southwest; near [[Cleveland, Tennessee]] it is only 200 feet thick. The [[rock (geology)|rock]] that is quarried for marble is a highly pure (97% CaCO<sub>3</sub>) [[crystalline]] [[limestone]], pink to cedar-red in color. |
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Revision as of 22:42, 16 January 2014
The Holston Formation, alternately known as the Holston Limestone, is a stratigraphic unit of Ordovician age within the Chickamauga Group in the Ridge-and-Valley physiographic province of the southeastern United States. A 120-mile (190 km) long outcrop belt of the Holston in East Tennessee is the source of the decorative building stone known as Tennessee marble.
its made of some rock like thing.
Near Knoxville the Holston Formation is about 400 feet (120 m) thick but it thins toward the southwest; near Cleveland, Tennessee it is only 200 feet thick. The rock that is quarried for marble is a highly pure (97% CaCO3) crystalline limestone, pink to cedar-red in color.
Use in building and sculpture
Among the notable buildings where Tennessee marble is used as a building stone are two in Washington, D.C.: the National Gallery of Art, which uses stone from Knox and Blount counties, and the United States Capitol, which has stairways constructed from Hawkins County marble.[1]
References
General
- Mineral Commodities, in Mineral Resources of the Appalachian Region, U.S. Geological Survey and U.S. Bureau of Mines, Geological Survey Professional Paper 580, 1968.
Notes
- ^ Descriptions and Origins of Selected Principal Building Stones of Washington, U.S. Geological Survey, revised 1-14-99, accessed December 23, 2007.
well
External links
- Knoxville's marble past, Knoxville News Sentinel, August 26, 2008 (article and videos)
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