late devonian extinction was the biggest mass extinction in geologic time.
what was the biggest mass extinction in geologic time?
late devonian extinction
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a major achievement of geochronometry is the documentation of geologic time, as represented in geologic time scales. a geologic time scale is a scheme that integrates the geochronologic subdivisions of geologic time and their absolute ages and durations. the latest version of the geologic time scale was published in 2004, and includes a comparison of present and past time scales. the greater efforts of geochronometry today are aimed at retrieving accurate ages of major events in the earth's history and of stage/age boundaries.





















































section::::see also.





















































bullet::::- earth science





















































bullet::::- stage (geology)





















































bullet::::- age (geology)





















































bullet::::- geologic time scale
geochronometry