Publication Date:
2022-05-25
Description:
Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Earth-Science Reviews 104 (2011): 111-142, doi:10.1016/j.earscirev.2010.09.003.
Description:
Planktonic foraminifera are widely utilized for the biostratigraphy of Cretaceous and
Cenozoic marine sediments and are a fundamental component of Cenozoic
chronostratigraphy. The recent enhancements in deep sea drilling recovery, multiple
coring and high resolution sampling both offshore and onshore, has improved the
planktonic foraminiferal calibrations to magnetostratigraphy and/or modified species
ranges. This accumulated new information has allowed many of the planktonic
foraminiferal bioevents of the Cenozoic to be revised and a reassessment of the
planktonic foraminiferal calibrations. We incorporate these developments and
amendments into the existing biostratigraphic zonal scheme.
In this paper we present an amended low-latitude (tropical and subtropical) Cenozoic
planktonic foraminiferal zonation. We compile 187 revised calibrations of planktonic
foraminiferal bioevents from multiple sources for the Cenozoic and have incorporated
these recalibrations into a revised Cenozoic planktonic foraminiferal biochronology. We
review and synthesize these calibrations to both the geomagnetic polarity time scale
(GPTS) of the Cenozoic and astronomical time scale (ATS) of the Neogene and late
Paleogene. On the whole, these recalibrations are consistent with previous work;
however, in some cases, they have led to major adjustments to the duration of biochrons.
Recalibrations of the early middle Eocene first appearance datums of Globigerinatheka
kugleri, Hantkenina singanoae, Guembelitrioides nuttalli and Turborotalia frontosa have
resulted in large changes in the durations of Biochrons E7, E8 and E9. We have
introduced (upper Oligocene) Zone O7 utilizing the biostratigraphic utility of
‘Paragloborotalia’ pseudokugleri. For the Neogene Period, major revisions are applied to
the fohsellid lineage of the middle Miocene and we have modified the criteria for
recognition of Zones M7, M8 and M9, with additional adjustments regarding the
Globigerinatella lineage to Zones M2 and M3. The revised and recalibrated datums
provide a major advance in biochronologic resolution and a template for future progress
to the Cenozoic time scale.
Description:
BSW acknowledges support from National Science
Foundation (NSF) CAREER Award (EAR-0847300), Consortium for Ocean
Leadership/NSF (OCE- 0352500) and the Natural Environment Research Council
(NE/G014817/1).
Keywords:
Cenozoic time scale
;
Planktonic foraminifera
;
Time scale calibration
;
Neogene time scale
;
Paleogene time scale
;
Biostratigraphy
Repository Name:
Woods Hole Open Access Server
Type:
Preprint
Format:
application/pdf
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