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  2. Geologic time scale - Wikipedia

    en.wikipedia.org/wiki/Geologic_time_scale

    An age is the smallest hierarchical geochronologic unit. It is equivalent to a chronostratigraphic stage. [14] [13] There are 96 formal and five informal ages. [2] The current age is the Meghalayan. A chron is a non-hierarchical formal geochronology unit of unspecified rank and is equivalent to a chronostratigraphic chronozone. [14]

  3. Wikipedia:Manual of Style/Dates and numbers - Wikipedia

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

    Comparable values near one another should be all spelled out or all in figures, even if one of the numbers would normally be written differently: patients' ages were five, seven, and thirty-two or ages were 5, 7, and 32, but not ages were five, seven, and 32.

  4. Help:Basic table markup - Wikipedia

    en.wikipedia.org/wiki/Help:Basic_table_markup

    Note, rowspan="2" and colspan="2" can be used on cells to span multiple rows and columns. Header cells are created with ! Header cell , which can be column or row headers.

  5. Template:Lifespan - Wikipedia

    en.wikipedia.org/wiki/Template:Lifespan

    This template may be used to display a person's or entity's whole lifespan in years, and optionally their final age or duration, also in years; the Gregorian calendar and AD/CE era are respectively, the implied default calendar and editable default era. Astronomical dates are not specifically handled; negative years are not allowed, but year '0' (zero) may be used when applicable. All date ...

  6. Geography - Wikipedia

    en.wikipedia.org/wiki/Geography

    Geography (from Ancient Greek γεωγραφία geōgraphía; combining gê 'Earth' and gráphō 'write') is the study of the lands, features, inhabitants, and phenomena of Earth. [1]

  7. Global Standard Stratigraphic Age - Wikipedia

    en.wikipedia.org/wiki/Global_Standard_Strati...

    In the stratigraphy sub-discipline of geology, a Global Standard Stratigraphic Age, abbreviated GSSA, is a chronological reference point and criterion in the geologic record used to define the boundaries (an internationally sanctioned benchmark point) between different geological periods, epochs or ages on the overall geologic time scale in a chronostratigraphically useful rock layer.

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  9. Glossary of geography terms (A–M) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_geography_terms...

    A unit of area traditionally defined as the area of a plot of land one chain (66 feet) by one furlong (660 feet), equivalent to 43,560 square feet (0.001563 sq mi; 4,047 m 2), or about 0.40 hectare. active volcano A volcano that is currently erupting, or one that has erupted within the last 10,000 years (the Holocene) or during recorded history ...