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a branch of geology dealing with the differentiation of sedimentary rock units on the basis of the fossils they contain.
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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    a bedded, blanketlike sedimentary deposit of organic origin built by marine organisms and including shell beds, flat reefs, and corals. noun a rock layer consisting of a deposit of organic material, such as fossils

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    noun the use of live sterile maggots to treat patients with infected wounds

  • Biosynthesis

    the formation of chemical compounds by a living organism. the laboratory preparation of biological molecules by the use of reagents or catalysts derived from natural substances and modeled on a series of reactions occurring in a living organism. noun the formation of complex compounds from simple substances by living organisms bi’o·syn·thet’ic (-thět’ĭk) adj.

  • Biosynthetic

    of, relating to, or characterized by biosynthesis, the formation of chemical compounds by a living organism, or a laboratory process modeled after these reactions in living organisms. of or relating to a substance produced by a biosynthetic process.

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