
Biostratigraphy is the branch of stratigraphy which focuses on correlating and assigning relative ages of rock strata by using the fossil assemblages contained within them. Usually the aim is correlation, demonstrating that a particular horizon in one geological section represents the same period of time as another horizon at some other section. T...
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http://en.wikipedia.org/wiki/Biostratigraphy

branch of stratigraphy which focuses on correlating and assigning relative ages of rock strata by using the fossil assemblages contained within them.
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http://en.wikipedia.org/wiki/Glossary_of_geology

The study and classification of rocks and their history based on their fossil content.
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http://jersey.uoregon.edu/~mstrick/geology/geo_glossary_page.html

The study of rock layers (e.g., distribution, environment of deposition, age) based on their fossils; biostratigraphic
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http://www.scientificpsychic.com/etc/geology-glossary.html

n. The study of rock layers (e.g., distribution, environment of deposition, age) based on their fossils; biostratigraphic- adj.
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http://www.ucmp.berkeley.edu/glossary/gloss2geol.html

n. The study of rock layers (e.g., distribution, environment of deposition, age) based on their fossils; biostratigraphic- adj.
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http://www.ucmp.berkeley.edu/glossary/glossary_2.html

biostratigraphy, biostratigraphic The study and classification of rock strata based on their fossil content; stratigraphic paleontology.
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http://www.wordinfo.info/words/index/info/view_unit/2724/10

The subdivision and correlation of sequences of strata using fossils.
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https://www.encyclo.co.uk/local/20501

The branch of geology concerned with the separation and differentiation of rock units by means of the study of the fossils they contain.
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https://www.encyclo.co.uk/local/21202

The classification of rock successions based on fossil content.
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https://www.encyclo.co.uk/local/23001

a branch of geology dealing with the differentiation of sedimentary rock units on the basis of the fossils they contain.
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https://www.infoplease.com/dictionary/biostratigraphy
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