The basic unit of biochronology is the biostratigraphic zone, or biozone, a collection of fossils found together in a rock unit.
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In the United States, biochronology is widely used as a synonym for biostratigraphy, but in Canada and Europe the term is reserved for biochronology that is not tied to a particular stratigraphic section.
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In the United States, biochronology is widely used as a synonym for biostratigraphy, but in Canada and Europe the term is reserved for biochronology that is not tied to a particular stratigraphic section.
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In addition, the unique fusion between geochronology and mammal evolutionary studies has made the Koobi Fora Formation a standard for interpreting biochronology, environmental change, and ecology for all of Pliocene-Pleistocene Africa.
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In particular, " facies-controlled organisms " ( organisms that lived in a particular sedimentary environment ) are not well suited for biochronology because they move with their environment and may change little over long periods of time.
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This form of biochronology is not recognized by the International Stratigraphic Guide, but it is " really what a great many paleontologists and stratigraphers are after . . . an optimum network of fossil correlations, thought to embody a reliable and high-resolution isochronous time ( lines ) framework ."
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