Biostratigraphy



a branch of geology dealing with the differentiation of sedimentary rock units on the basis of the fossils they contain.
biostratigraphy
(bī’ō-strə-tĭg’rə-fē)
The study and categorization of rock strata based on their fossil content and distribution. Biostratigraphic data are often considered together with radiometric and paleoenvironmental data as a means of dating rock strata. Compare lithostratigraphy.

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