biostratigraphy

noun

bio·stra·tig·ra·phy | \ ˌbī-ō-strə-ˈti-grə-fē

Definition of biostratigraphy

1 : the identification of fossils found within sedimentary rock strata as a method of determining the relative geologic age of the rock also : the branch of paleontology involving such identification

2 : the arrangement of fossils in rock strata

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Examples of biostratigraphy in a Sentence

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Researchers also used biostratigraphy, which is the study of how fossils appear, proliferate and disappear throughout the rock record, to establish relative ages. — Erin Dimaggio, Smithsonian, "How Do Scientists Date Fossils?," 13 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'biostratigraphy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.