- na liptinite maceral that is generally spherical or ovoid, frequently having a crenulated border and somewhat irregular reflectance and sometimes occurring in clusters reflecting an origin from Botryococcus algae.DISCUSSION — Alginite often occurs as degraded fragments derived from colonial or unicellular bodies.
ASTM D121-09a Standard Terminology of Coal and Coke. 2014.
Look at other dictionaries:
Alginite — is a component of some types of kerogen alongside amorphous organic matter. Alginite consists of organic walled marine microfossils, distinct from inorganic (silica) walled microfossils that comprise diatomaceous earth. At least two forms of… … Wikipedia
Kerogen — is a mixture of organic chemical compounds that make up a portion of the organic matter in sedimentary rocks. [ [http://www.glossary.oilfield.slb.com/Display.cfm?Term=kerogen Oilfield Glossary] ] It is insoluble in normal organic solvents because … Wikipedia
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
Альгинит — (от лат. alga морская трава, водоросль * a. alginites, exinites; н. Alginitklasse; ф. alginite; и. exinita) группа микрокомпонентов ископаемых углей, образовавшихся в результате преобразования низших растений и планктона. Подразделяется… … Геологическая энциклопедия
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
boghead coal — n nonbanded coal in which the liptinite (the waxy component) is predominantly alginite … 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