Define biostratigraphic dating

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They must also be short lived as a species, so that the period of time during which they could be incorporated in the sediment is relatively narrow.

The longer lived the species, the less accurate the correlation, and so fossils that evolve rapidly, such as ammonites, are favoured over forms that evolve much more slowly, like nautiloids. Below are some basic principles, concepts and definitions often used in biostratrigraphy.

Concept of Stage: It is a major subdivision of strata, each systematically following the other each bearing a unique assemblage of fossils.

D'Orbigny, a French palaeontologist, is credited for the invention of this concept.

He named these stages after geographic localities with particularly good section of rock that bear the characteristic fossils on which the stages are based.

Concept of Zone: Albert Oppel, in 1856, introduced the concept of zone (also known as biozones or Oppel zone).

haukumiali, Here is some basic information on biostratrigraphy. Biostratigraphy is the science of dating rocks by using the fossils contained within them.

Usually the aim is correlation, that is, demonstrating that a particular horizon in one geological section represents the same period of time as another horizon at some other section.

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