biochron


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biochron

[′bī·ō‚krän]
(paleontology)
A fossil of relatively short range of time.
References in periodicals archive ?
The ichnological record there fore coincides most parsimoniously with the late Stephanian Dromopus biochron of Lucas (2003).
The LJ3-1 transgressive peak seems to have an age corresponding to the Upper Pliensbachian Margaritatus Biochron in the Basque-Cantabrian Basin, in the Lusitanian Basin and in the Tethyan domain, representing another key interval for correlation purposes.
Analysis of taphonomic gradients and biostratigraphic data indicate that sedimentation in this eastern area was interrupted very early, probably at the Bullatus-Gracilis Chronozone boundary or even during the Bullatus Biochron.
hantkeninoides Biochron, and remained unchanged through the rest of the section (through the Ps.