In biostratigraphy, a local-range zone, topozone or teilzone (German teil = part + Greek zone) is the stratigraphic range of the rock unit between the first and last appearance datum of a particular taxon in a local area. It is a subset of the global biozone for that taxon. For the teilzone data to be meaningful, the local area must be identified....
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http://en.wikipedia.org/wiki/Teilzone
(from the article `biozone`) ...a particular fossil and, hence, deposited during its existence. The extent of the unit in a particular place, on the local stratigraphic range of ...
Found on
http://www.britannica.com/eb/a-z/t/20
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