Biostratigraphy dating

A biostratigraphic zone is a body of rock defined or characterized by its fossil content.

The clustering of fossil extinctions often represents missing or condensed sections.

It has allowed the creation of the New Zealand Geological Time Scale.older, younger, same age) of sedimentary rocks between different geographic localities.Although the basic rules of biostratigraphic zonation were established in the late 18th to early 19th centuries in Europe (ultimately resulting in the development of the Relative Geologic Time Scale), the implementation of biostratigraphic techniques was in use in the United States during the early to mid-1800's.Planktic species (that float and live in the surface water of the oceans) are best because they are widely distributed and independent of the type of seafloor sediment.In contrast, benthic (seafloor) species may be restricted to particular sediments.

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