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For example, the site cannot determine your email name unless you choose to type it.Allowing a website to create a cookie does not give that or any other site access to the rest of your computer, and only the site that created the cookie can read it.The authors used a log of celery pine from within Kaharoa deposits to derive a new precise date for the eruption via “wiggle-matching” – matching the radiocarbon dates of a sequence of samples from the log with the Southern Hemisphere calibration curve.The date obtained was 1314 ± 12 AD (2σ error), and the first environmental impacts and human occupation are argued to have occurred in the previous 50 years, i.e.Below are the most common reasons: This site uses cookies to improve performance by remembering that you are logged in when you go from page to page.To provide access without cookies would require the site to create a new session for every page you visit, which slows the system down to an unacceptable level.A tentative dendrochronological placement of the 213-year sequence against other tree-ring series suggests an absolute date range of AD 398–610 for the time-series (Pearson et al. We report a radiocarbon dating project to provide an independent near-absolute chronological placement for this important chronology. Sample YMT-263, which is employed in this study, came from this dock. Samples placed at the tentative dendro-date (figure modified from Pearson et al. The Ox Cal D_Sequence analysis employed the mid-point of each set of dated tree-rings.


Dating initial colonisation and environmental impacts by Polynesians in New Zealand is controversial.A key horizon is provided by the Kaharoa Tephra, deposited from an eruption of Mt Tarawera, because just underneath this layer are the first signs of forest clearance which imply human settlement.This site stores nothing other than an automatically generated session ID in the cookie; no other information is captured.In general, only the information that you provide, or the choices you make while visiting a web site, can be stored in a cookie.

C concentrations as archived in Northland sub-fossil kauri during the Younger Dryas Stadial (~12,950 to 11,600 years ago) and Oxygen isotope Stage 3 (~24,000 to 60,000 years ago); development of the Southern Hemisphere radiocarbon calibration curve, SHCal13 by decadal, high precision analysis of New Zealand kauri, silver pine and cedar samples.

A 213-year oak tree-ring chronology has been constructed from timbers from several sites from first-millennium AD Constantinople, in particular, from the study of over 2000 samples from harbour installations at Yenikapı (Figure 1), Istanbul (Pekin & Kangal 2007) (Figure 2). View of a small part of the Yenikapı excavation taken in July 2009 (looking to the SE) showing one of the wooden harbour installations from which samples were taken (Mürvet's Dock, informally named after the supervisor pending official nomenclature). Samples are grouped according to specific structures. RY = relative years (tree-ring) in terms of the floating 213-year chronology.



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