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Encyclopedia > Shale
Shale
Shale

Shale is a fine-grained sedimentary rock whose original constituents were clays or muds. It is characterized by thin laminae breaking with an irregular curving fracture, often splintery and usually parallel to the often-indistinguishable bedding plane. This property is called fissility. Non-fissile rocks of similar composition but made of particles smaller than 1/16 mm are described as mudstones. Rocks with similar particle sizes but with less clay and therefore grittier are siltstones. Shale Source: US Government File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Shale Source: US Government File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Two types of sedimentary rock: limey shale overlaid by limestone. ... The Gay Head cliffs in Marthas Vineyard are made almost entirely of clay. ... Some dried mud with windblown stones. ... Fissility refers to the property of mudstones to split along layers, more or less parallel to the plane of bedding, thus becoming described as shales. ... Fissility refers to the property of mudstones to split along layers, more or less parallel to the plane of bedding, thus becoming described as shales. ... The rocky side of a mountain creek near Orosí, Costa Rica. ... Mudstone is a fine-grained sedimentary rock whose original constituents were clays or muds. ... Siltstone Siltstone is a geological term for a sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone. ...


Shale is the most common sedimentary rock.[1]


Formation

Limey shale overlaid by limestone, Cumberland Plateau, Tennessee
Limey shale overlaid by limestone, Cumberland Plateau, Tennessee

The process in the rock cycle which forms shale is compaction. The fine particles that compose shale can remain suspended in water long after the larger and denser particles of sand have deposited out. Shales are typically deposited in very slow moving water and are often found in lake and lagoonal deposits, in river deltas, on floodplains and offshore of beach sands. They can also be deposited on the continental shelf, in relatively deep, quiet water. Limey shale overlaid by limestone, Cumberland Plateau, TN Image taken by me, released under GFDL Pollinator 05:38, 21 Mar 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Limey shale overlaid by limestone, Cumberland Plateau, TN Image taken by me, released under GFDL Pollinator 05:38, 21 Mar 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... This article or section does not cite any references or sources. ... The Cumberland Plateau includes much of eastern Kentucky and western West Virginia in the United States. ... Official language(s) English Capital Nashville Largest city Memphis Largest metro area Nashville Area  Ranked 36th  - Total 42,169 sq mi (109,247 km²)  - Width 120 miles (195 km)  - Length 440 miles (710 km)  - % water 2. ... The rock cycle is a fundamental concept in geology that describes the dynamic transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. ... This page is a candidate for speedy deletion. ...  Sediment  Rock  Mantle  The global continental shelf, highlighted in cyan The continental shelf is the extended perimeter of each continent, which is covered during interglacial periods such as the current epoch by relatively shallow seas (known as shelf seas) and gulfs. ...


'Black shales' are dark, as a result of being especially rich in unoxidized carbon. Common in some Paleozoic and Mesozoic strata, black shales were deposited in anoxic, reducing environments, such as in stagnant water columns (see oil shale). The most fundamental reactions in chemistry are the redox processes. ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Standard atomic weight 12. ... The Paleozoic Era (from the Greek palaio, old and zoion, animals, meaning ancient life) is the earliest of three geologic eras of the Phanerozoic eon. ... The Mesozoic Era is one of three geologic eras of the Phanerozoic eon. ... For other uses, see strata (novel) and strata title. ... Asphyxia is a condition of severely deficient supply of oxygen to the body. ... Oil Shale Oil shale is a general term applied to a fine-grained sedimentary rock containing enough organic material (called kerogen) to yield oil and combustible gas upon distillation. ...


Fossils, animal tracks/burrows and even raindrop impact craters are sometimes preserved on shale bedding surfaces. Shales may also contain concretions. FOSSIL is a standard for allowing serial communication for telecommunications programs under DOS. FOSSIL is an acronym for Fido Opus Seadog Standard Interface Layer. ... 1. ...


Shales that are subject to heat and pressure alter into a hard, fissile, metamorphic rock known as slate, which is often used in building construction. Quartzite, a form of metamorphic rock, from the Museum of Geology at University of Tartu collection. ... Slate Thick slate fragment Slate roof Slate is a fine-grained, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low grade regional metamorphism. ...

Weathering shale at a road cut in southeastern Kentucky
Weathering shale at a road cut in southeastern Kentucky

Image File history File linksMetadata Download high resolution version (1500x1125, 602 KB)weathering shale at a road cut in southeastern Kentucky Image copyleft: Image taken by me, released under GFDL, Pollinator 06:32, 23 February 2006 (UTC) Permission is granted to copy, distribute and/or modify this document under the... Image File history File linksMetadata Download high resolution version (1500x1125, 602 KB)weathering shale at a road cut in southeastern Kentucky Image copyleft: Image taken by me, released under GFDL, Pollinator 06:32, 23 February 2006 (UTC) Permission is granted to copy, distribute and/or modify this document under the... Weathering is the process of breaking down rocks, soils and their minerals through direct contact with the atmosphere. ... Official language(s) English[1] Capital Frankfort Largest city Louisville Area  Ranked 37th  - Total 40,444 sq mi (104,749 km²)  - Width 140 miles (225 km)  - Length 379 miles (610 km)  - % water 1. ...

See also

Bituminous shale is an argillaceous shale impregnated with bitumen, often accompanying coal. ... Oil Shale Oil shale is a general term applied to a fine-grained sedimentary rock containing enough organic material (called kerogen) to yield oil and combustible gas upon distillation. ... Hallucigenia sparsa, one of the organisms unique to the Burgess Shale. ... Gem animals. ... The Barnett Shale is a large geological formation in the U.S. State of Texas. ... Slate Thick slate fragment Slate roof Slate is a fine-grained, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low grade regional metamorphism. ... Siltstone Siltstone is a geological term for a sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone. ... Mudstone is a fine-grained sedimentary rock whose original constituents were clays or muds. ...

References

  • Blatt, Harvey and Robert J. Tracy, 1996, Petrology: Igneous, Sedimentary and Metamorphic, 2nd ed., Freeman, ISBN 0-7167-2438-3

  Results from FactBites:
 
Oil shale - definition of Oil shale in Encyclopedia (592 words)
Oil shale is a general term applied to a group of fine fl to dark brown shales rich enough in bituminous material (called kerogen) to yield petroleum upon distillation.
During pyrolysis the oil shale is heated to 500° C in the absence of air and the kerogen is converted to oil and separated out, a process called "retorting".
Oil shale exploitation has all the normal environmental effects from open-pit mining, the pre-refining stage to get crude oil may emit ash, pipelines must be built to an oil refinery, and the waste rock must be disposed of, rock which incidentally is a known carcinogen.
Shale - Wikipedia, the free encyclopedia (190 words)
Shale is a fine-grained sedimentary rock whose original constituents were clays or muds.
Shales are typically deposited in very slow moving water and are often found in lake and lagoonal deposits, in river deltas, on floodplains, and offshore of beach sands.
Shales that are subject to heat and pressure alter into a hard, fissile, and metamorphic material known as slate that is often used in building construction.
  More results at FactBites »

 
 

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