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- Coal_ball abstract "A coal ball is a type of concretion that is found in coal seams and consists of plant debris (peat), which has been permineralised by calcite. Coal balls vary in shape from imperfectly spherical to flat-lying, irregular slabs. These concretions were formed by the early permineralisation of peat by calcite in Carboniferous Period swamps and mires prior to its alteration to coal. They derive their name from their association with coal and their often imperfectly spherical shape. Because they formed in prehistoric peats prior to their coalification, they often preserve a remarkable record of the tissue structure of Carboniferous swamp and mire plants, which would otherwise have been completely destroyed. Their unique preservation of the tissue structures of Carboniferous plants makes them valuable to scientists, who cut and peel the coal balls to research the geological past.In 1855, two English scientists, Joseph Dalton Hooker and Edward William Binney, made the first scientific description of coal balls in England, and the initial research on coal balls was carried out in Europe. North American coal balls were discovered and identified in 1922. Coal balls have since been found in other countries, and they have led to the discovery of hundreds of species and genera.Coal balls may be found in coal seams across North America and Eurasia. North American coal balls are more widespread, both stratigraphically and geologically, than those in Europe. The oldest known coal balls date from the Namurian stage of the Carboniferous; they were found in Germany and on the territory of former Czechoslovakia.".
- Coal_ball thumbnail Coalball.jpg?width=300.
- Coal_ball wikiPageExternalLink 221.
- Coal_ball wikiPageExternalLink c480.pdf.
- Coal_ball wikiPageExternalLink reconstuct9.htm.
- Coal_ball wikiPageExternalLink Phillips.htm.
- Coal_ball wikiPageExternalLink x2.
- Coal_ball wikiPageExternalLink 60Wv0sx12.
- Coal_ball wikiPageExternalLink 60aBzdvjr.
- Coal_ball wikiPageExternalLink 60pHMElgE.
- Coal_ball wikiPageExternalLink 61DXItxK1.
- Coal_ball wikiPageID "34240882".
- Coal_ball wikiPageRevisionID "605579684".
- Coal_ball composition "Permineralised plant remains".
- Coal_ball hasPhotoCollection Coal_ball.
- Coal_ball imageAlt "A greyish-brown round object with some pits and horizontal lines about the size of a cantaloupe.".
- Coal_ball imageCaption "A coal ball".
- Coal_ball imageSize "220".
- Coal_ball name "Coal ball".
- Coal_ball subject Category:Articles_created_via_the_Article_Wizard.
- Coal_ball subject Category:Carboniferous.
- Coal_ball subject Category:Fossils.
- Coal_ball subject Category:Geology.
- Coal_ball subject Category:Mineralogy.
- Coal_ball subject Category:Paleobotany.
- Coal_ball subject Category:Paleontology.
- Coal_ball subject Category:Plants.
- Coal_ball type LivingThing100004258.
- Coal_ball type NaturalObject100019128.
- Coal_ball type Object100002684.
- Coal_ball type Organism100004475.
- Coal_ball type PhysicalEntity100001930.
- Coal_ball type Plant100017222.
- Coal_ball type Plants.
- Coal_ball type Rock109416076.
- Coal_ball type Whole100003553.
- Coal_ball comment "A coal ball is a type of concretion that is found in coal seams and consists of plant debris (peat), which has been permineralised by calcite. Coal balls vary in shape from imperfectly spherical to flat-lying, irregular slabs. These concretions were formed by the early permineralisation of peat by calcite in Carboniferous Period swamps and mires prior to its alteration to coal. They derive their name from their association with coal and their often imperfectly spherical shape.".
- Coal_ball label "Bola de carbón".
- Coal_ball label "Boulet de charbon".
- Coal_ball label "Coal ball".
- Coal_ball label "Torfdolomit".
- Coal_ball sameAs Torfdolomit.
- Coal_ball sameAs Bola_de_carbón.
- Coal_ball sameAs Boulet_de_charbon.
- Coal_ball sameAs m.0h3w0vk.
- Coal_ball sameAs Q574636.
- Coal_ball sameAs Q574636.
- Coal_ball sameAs Coal_ball.
- Coal_ball wasDerivedFrom Coal_ball?oldid=605579684.
- Coal_ball depiction Coalball.jpg.
- Coal_ball isPrimaryTopicOf Coal_ball.