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range zone


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A unit of strata that is defined by the presence and time range of a particular fossil taxon. A range zone comprises the entire vertical and horizontal extent of the given organism. When used formally, the term is often capitalized and the qualifying fossil name given in italics, with the generic name capitalized and the specific name in lower-case letters (e.g. the stratigraphic range of the Late Jurassic ammonite Cardioceras cordatum delimits the Cardioceras cordatum Range zone).

Subjects: Earth Sciences and Geography — Ecology and Conservation.


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