==Biostratigraphic utility of microfossil groups==
==Biostratigraphic utility of microfossil groups==
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The chart below shows the geologic periods in which various microfossil groups existed and those periods for which the groups are most useful for dating.
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[[file:applied-paleontology_fig17-13.png|thumb|{{figure number|17-13}}See text for explanation.]]
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[[file:applied-paleontology_fig17-13.png|thumb|{{figure number|1}}See text for explanation.]]
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The chart in [[:file:applied-paleontology_fig17-13.png|Figure 1]] shows the geologic periods in which various microfossil groups existed and those periods for which the groups are most useful for dating.