biostratigraphy

Science Dictionary
biostratigraphy   (bī'ō-strə-tĭg'rə-fē)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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