banded coal

полосчатый уголь
слоистый уголь

English-Russian dictionary of geology. 2011.

Смотреть что такое "banded coal" в других словарях:

  • banded coal — n coal that is visibly heterogeneous in composition, being composed of layers of vitrain and attrital coal, and, commonly, fusain …   Coke&Coal Terminology

  • coal — n a brown to black combustible sedimentary rock (in the geological sense) composed principally of consolidated and chemically altered plant remains. DISCUSSION Conditions required for formation of coal are believed to include accumulation of… …   Coke&Coal Terminology

  • Coal type —   The classification is based on physical characteristics or microscopic constituents. Examples of coal types are banded coal, bright coal, cannel coal, and splint coal. The term is also used to classify coal according to heat and sulfur content …   Energy terms

  • Coal type according to appearance — ▪ Table Coal type according to appearance and composition type main components opaque attritus percent banded coal (>5 percent anthraxylon) bright anthraxylon and translucent attritus …   Universalium

  • coal — coalless, adj. /kohl/, n. 1. a black or dark brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Cf. anthracite, bituminous coal, lignite. 2. a piece of glowing, charred, or burned wood or other… …   Universalium

  • attrital coal — n the ground mass or matrix of banded coal in which vitrain and, commonly, fusain layers as well, are embedded or enclosed. DISCUSSION Layers in banded coal, often referred to as bands, are commonly 1 to 30 mm thick. Attrital coal in banded coal… …   Coke&Coal Terminology

  • nonbanded coal — n consistently fine granular coal essentially devoid of megascopic layers. DISCUSSION Nonbanded coal may be interbedded with common banded coal, or form a discrete layer at the top or at the bottom of the seam, or may compose the entire seam. It… …   Coke&Coal Terminology

  • Bituminous coal — is a relatively soft coal containing a tarlike substance called bitumen. It is of higher quality than lignite coal but poorer quality than anthracite coal. Bituminous coal is an organic sedimentary rock formed by diagenetic and submetamorphic… …   Wikipedia

  • bituminous coal — a mineral coal that contains volatile hydrocarbons and tarry matter and burns with a yellow, smoky flame; soft coal. [1875 80] * * * or soft coal Most abundant form of coal. It is dark brown to black and has a relatively high heat value. Widely… …   Universalium

  • lithotype — n 1) (1) Rock form defined on the basis of certain selected physical characteristics. (2) One of the four macroscopically recognized constituents of banded coal: vitrain, clarain, durain and fusain. D4596 2) any of the constituents of banded coal …   Coke&Coal Terminology

  • vitrain — n shiny black bands, thicker than 0.5 mm, of subbituminous and higher rank banded coal. DISCUSSION Vitrain, attributed to the coalification of relatively large fragments of wood and bark, may range up to about 30 mm (approximately 1 in.) thick in …   Coke&Coal Terminology

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