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|a :10.1016/j.quascirev.2008.11.001 |2 doi |
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|a A sustained + 21m sea-level highstand during MIS 11 (400 ka) |h [electronic resource] |b direct fossil and sedimentary evidence from Bermuda. |
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|a [S.l.] : |b Elsevier, |c 2009. |
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|a Quaternary Science Reviews Numbe 28 |y English. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a A small, protected karstic feature exposed in a limestone quarry in Bermuda preserved abundant sedimentary
and biogenic materials documenting a transgressive phase, still-stand, and regressive phase of
a sea-level in excess of 21.3 m above present during Marine Isotope Stage (MIS) 11 (400 ka) as determined
by U/Th dating and amino acid racemization. Cobbles and marine sediments deposited during the
high-energy transgressive phase exhibit rim cements indicating a subsequent phreatic environment. This
was succeeded stratigraphically by a still-stand deposition of fine calcareous lagoonal sediments containing
bioclasts of red algae and benthic and planktonic foraminifera that was intensely burrowed by
marine invertebrates, probably upogebiid shrimp, that could not be produced under any condition other
than sustained marine submergence. Overlying this were pure carbonate beach sands of a low-energy
regressive phase containing abundant remains of terrestrial and marine vertebrates and invertebrates.
The considerable diversity of this fauna along with taphonomic evidence from seabird remains indicates
deposition by high run-up waves over a minimum duration of months, if not years. The maximum
duration has yet to be determined but probably did not exceed one or two thousand years. The most
abundant snails in this fauna are two species indicative of brackish water and high-tide line showing that
a Ghyben-Herzberg lens must have existed at > þ 20 m. The nature of these sediments and fossil
accumulation is incompatible with tsunami deposition and, given the absence of evidence for tectonic
uplift of the Bermuda pedestal or platform, provide proof that sea-level during MIS 11 exceeded þ20 m,
a fact that has widespread ramifications for geologists, biogeographers, and human demographics along
the world’s coastlines. |
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|a Electronic reproduction. |c Florida Intertatiional University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|t A sustained + 21m sea-level highstand during MIS 11 (400 ka) |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15061836/00001 |y Click here for full text |
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|3 Host material |u http://www.researchgate.net/profile/Paul_Hearty/publication/240752030_A_sustained_21_m_highstand_during_MIS_11_(400_ka)_direct_fossil_and_sedimentary_evidence_from_Bermuda._Quaternary_Science_Reviews_28_271-285/links/0c96051c7177e8b1b2000000.pdf |y A sustained + 21m sea-level highstand during MIS 11 (400 ka) |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/18/36/00001/Olson_Hearty_2009_A sustained 21m sea-level highstand during MIS 11 (400ka)thm.jpg |
