- na liptinite maceral exhibiting various lenticular, oval, or round forms that reflect the cross-sectioning of a flattened, hollow, ovoid body; sometimes exhibits rod-like projections that are small relative to the size of the total body.DISCUSSION — Sporinite originated as a lipid substance that covered, as a skin, ovoid spore or pollen grains which commonly ranged from around ten to several hundred micrometres in diameter. Sporinite often occurs as fragments derived from these initially ovoid bodies.
ASTM D121-09a Standard Terminology of Coal and Coke. 2014.
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Maceral — A maceral is a component of coal or oil shale. The term maceral in reference to coal is analogous to the use of the term mineral in reference to igneous or metamorphic rocks. Examples of macerals are inertinite, vitrinite and liptinite.… … Wikipedia
Exinite — Formerly, in coal geology, exinite was an umbrella term, used when referring to the finely ground and macrerated remains, originally formed by spores, pollen, dinoflagellate cysts, leaf cuticles, plant resins and waxes, as found in coal deposits … Wikipedia
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
maceral — ▪ organic compound Petrologic components in coal and their groupings Petrologic components in coal and their groupingsany of the numerous microscopically recognizable, individual organic constituents of coal with characteristic physical… … Universalium
Petrologic components in coal and their groupings — ▪ Table Petrologic components (macerals) in coal and their groupings maceral grouping in Europe macerals maceral grouping in the United States name in Europe* name in the United States** vitrinite telinite megascopic anthraxylon attrital… … Universalium
CHARBONS — Toute une série de roches sédimentaires, tourbe, lignite et houille, entre autres, résultent de la transformation d’anciens végétaux terrestres. Les débris de plantes mortes sont normalement détruits à l’air, mais noircissent sous l’eau par… … Encyclopédie Universelle
cannel coal — n nonbanded coal in which the liptinite is predominantly sporinite. DISCUSSION Transitions between cannel and boghead, that is, coals containing both types of liptinite, are also known. Microscopic examination is essential for differentiation of… … Coke&Coal Terminology
exinite — Deprecated term. Use preferred term liptinite; sometimes has also been used as a synonym for sporinite … Coke&Coal Terminology
maceral — n an organic substance in coal that is distinguished and classified on the basis of its optical microscopic properties. DISCUSSION Macerals originate from plant tissues, secretions, and exudates that have been altered by geological processes and… … Coke&Coal Terminology