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  2. Concretion - Wikipedia

    en.wikipedia.org/wiki/Concretion

    Concretions in Torysh, Western Kazakhstan Concretions with lens shape from island in Vltava river, Prague, Czech Republic Marlstone aggregate concretion, Sault Ste. Marie, Michigan, United States A concretion is a hard and compact mass formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary ...

  3. Mazon Creek fossil beds - Wikipedia

    en.wikipedia.org/wiki/Mazon_Creek_fossil_beds

    The fossiliferous concretions are found in the Mazon River area of Grundy, Will, Kankakee, and Livingston counties. Additional fossils are found in LaSalle County, Illinois; between the Vermilion River and Marseilles, Illinois. The ironstone concretions are recovered from exposures along streams, roadcuts and in active or abandoned coal mine areas.

  4. List of typographical symbols and punctuation marks

    en.wikipedia.org/wiki/List_of_typographical...

    This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters. For other languages and symbol sets (especially in mathematics Physis and science), see below

  5. Pseudofossil - Wikipedia

    en.wikipedia.org/wiki/Pseudofossil

    One common example is when manganese oxides crystallize with a characteristic tree-like or dendritic pattern along a rock fracture. The formation of frost dendrites on a window is another common example of this crystal growth. Concretions are sometimes thought to be fossils, and occasionally one contains a fossil, but are generally not fossils ...

  6. Lists of abbreviations - Wikipedia

    en.wikipedia.org/wiki/Lists_of_abbreviations

    Lists of abbreviations in the English language: Athletics abbreviations; List of business and finance abbreviations; List of computing and IT abbreviations; List of ecclesiastical abbreviations; List of energy abbreviations; List of abbreviations in photography; List of glossing abbreviations (grammatical terms used in linguistic interlinear ...

  7. Coal ball - Wikipedia

    en.wikipedia.org/wiki/Coal_ball

    A coal ball is a type of concretion, varying in shape from an imperfect sphere to a flat-lying, irregular slab.Coal balls were formed in Carboniferous Period swamps and mires, when peat was prevented from being turned into coal by the high amount of calcite surrounding the peat; the calcite caused it to be turned into stone instead.

  8. Wikipedia:List of English contractions - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:List_of_English...

    This is a list of contractions used in the Wikipedia:Manual of Style/Abbreviations; these are to be avoided anywhere other than in direct quotations in encyclopedic prose. Some acronyms are formed by contraction; these are covered at Wikipedia:Manual of Style/Abbreviations .

  9. Enterolith - Wikipedia

    en.wikipedia.org/wiki/Enterolith

    An enterolith is a mineral concretion or calculus formed anywhere in the gastrointestinal system. Enteroliths are uncommon and usually incidental findings but, once found, they require at a minimum watchful waiting. If there is evidence of complications, they must be removed.