| 翻訳と辞書 |
| Hallstatt plateau ： ウィキペディア英語版 |
Hallstatt plateau
The Hallstatt plateau is a term used in archaeology that refers to a consistently flat area on graphs that plot radiocarbon dating against calendar dates. Radiocarbon dates of around 2450 BP (Before Present) always calibrate to ca. 800-400 BC, no matter the measurement precision.〔Van der Plicht RADIOCARBON, THE CALIBRATION CURVE http://cio.eldoc.ub.rug.nl/FILES/root/2004/NATOSciIVvdPlicht/2004NATOSciIVvdPlicht.pdf〕 The carbon 14 dating method is hampered by this large plateau on the calibration curve from ca. 800-400 BC (at 2450 BP), a critical period in human technological development. Just before and after the plateau, calibration is accurate; during the plateau only techniques like wiggle matching can yield useful calendar ages.
==Wiggle matching==
Andrew Millard says that this plateau is named after the Hallstatt culture period in central Europe with which it coincides.〔Millard, A.R. Comment on article by Blackwell and Buck http://ba.stat.cmu.edu/journal/2008/vol03/issue02/millard.pdf〕 Millard also explains that wiggle matching is a term which has wide acceptance in the radiocarbon community, and involves taking a series of radiocarbon dates where the prior knowledge about the true calendar dates of the samples can be expressed as known differences in age between those samples, or occasionally as differences in age with some small uncertainty. The series of radiocarbon dates can then be matched to the calibration curve to provide a relatively precise estimate of age. When the results are plotted on a graph the `wiggles' in the sample sequence of radiocarbon dates match the 'wiggles' in the calibration curve - hence the name.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Hallstatt plateau」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|