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单词 shale
释义

shale


shale

S0313500 (shāl)n. A fissile rock composed of layers of claylike, fine-grained sediments.
[Probably from Middle English, shell, from Old English scealu; see skel- in Indo-European roots.]
shal′ey adj.

shale

(ʃeɪl) n (Geological Science) a dark fine-grained laminated sedimentary rock formed by compression of successive layers of clay-rich sediment[Old English scealu shell; compare German Schalstein laminated limestone; see scale1, scale2] ˈshaly adj

shale

(ʃeɪl)

n. a rock of fissile or laminated structure formed by the consolidation of clay or argillaceous material. [1740–50] shale′like`, shal′ey, adj.

shale

(shāl) A fine-grained sedimentary rock consisting of compacted and hardened clay, silt, or mud. Shale forms in many distinct layers and splits easily into thin sheets or slabs. It varies in color from black or gray to brown or red. See Table at rock.

shale

A type of layered sedimentary rock formed chiefly from clay.
Thesaurus
Noun1.shale - a sedimentary rock formed by the deposition of successive layers of clayshale - a sedimentary rock formed by the deposition of successive layers of claysedimentary rock - rock formed from consolidated clay sedimentshumic shale - shale that is rich in humic acidsoil shale - shale from which oil can be obtained by heating
Translations
烟熏程度烟雾性

shale

(ʃeil) noun type of rock from which oil is sometimes obtained. 煙霧 烟雾性,烟熏程度

shale


shale,

sedimentary rockrock,
aggregation of solid matter composed of one or more of the minerals forming the earth's crust. The scientific study of rocks is called petrology. Rocks are commonly divided, according to their origin, into three major classes—igneous, sedimentary, and metamorphic.
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 formed by the consolidation of mud or clay, having the property of splitting into thin layers parallel to its bedding planes. Shale tends to be fissile, i.e., it tends to split along planar surfaces between the layers of stratified rock. Shales comprise an estimated 55% of all sedimentary rocks. The composition of shale varies widely. Shales with very high silica content may have been formed when large quantities of diatomsdiatom
, unicellular organism of the kingdom Protista, characterized by a silica shell of often intricate and beautiful sculpturing. Most diatoms exist singly, although some join to form colonies.
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 and volcanic ash were present in the original sediment. Large numbers of fossilsfossil,
remains or imprints of plants or animals preserved from prehistoric times by the operation of natural conditions. Fossils are found in sedimentary rock, asphalt deposits, and coal and sometimes in amber and certain other materials.
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 in shales may give them a high calcium content; such shales may grade into limestoneslimestone,
sedimentary rock wholly or in large part composed of calcium carbonate. It is ordinarily white but may be colored by impurities, iron oxide making it brown, yellow, or red and carbon making it blue, black, or gray. The texture varies from coarse to fine.
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. Shales that contain a large percentage of aluminaalumina
or aluminum oxide,
Al2O3, chemical compound with m.p. about 2,000&degC; and sp. gr. about 4.0. It is insoluble in water and organic liquids and very slightly soluble in strong acids and alkalies. Alumina occurs in two crystalline forms.
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 are used as a source of that mineral in the manufacture of cementcement,
binding material used in construction and engineering, often called hydraulic cement, typically made by heating a mixture of limestone and clay until it almost fuses and then grinding it to a fine powder.
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, and those that contain natural gas and petroleum have become a significant energy resource in the 21st cent. due to the use of hydraulic fracturing techniques in drilling. Shales containing abundant carbonaceous matter grade into bituminous coalcoal,
fuel substance of plant origin, largely or almost entirely composed of carbon with varying amounts of mineral matter. Types

There is a complete series of carbonaceous fuels, which differ from each other in the relative amounts of moisture, volatile matter,
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.

shale

[shāl] (petrology) A fine-grained laminated or fissile sedimentary rock made up of silt- or clay-size particles; generally consists of about one-third quartz, one-third clay materials, and one-third miscellaneous minerals, including carbonates, iron oxides, feldspars, and organic matter.

shale

Argillaceous sedimentary rock derived from clays or silts; typically thinly laminated and weak along planes; may be undesirable as a concrete aggregate.

shale

a dark fine-grained laminated sedimentary rock formed by compression of successive layers of clay-rich sediment

SHALE


AcronymDefinition
SHALEStand-Off High Altitude Long Endurance (Aircraft)

shale


Related to shale: Burgess Shale
  • noun

Words related to shale

noun a sedimentary rock formed by the deposition of successive layers of clay

Related Words

  • sedimentary rock
  • humic shale
  • oil shale
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