单词	biostratigraphy
释义	biostratigraphy noun bio·​stra·​tig·​ra·​phy ˌbī-ō-strə-ˈti-grə-fē  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 biostratigraphic ˌbī-ō-ˌstra-tə-ˈgra-fik adjective Example Sentences Recent Examples on the Web 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, 13 June 2019 Word History Etymology International Scientific Vocabulary First Known Use 1921, in the meaning defined at sense 1
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