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Search results for: dendrochronolog in all categories
117 results found.
12 pages of results. 71. Society News [Journals] [SIS Workshop]
... has raised (i .e . made older) the dates of the Old Kingdom by several centuries in line with C-14 results. To achieve this he arbitrarily adds the extra centuries into the First Intermediate Period! (Vol II p. xxviii). He has also raised some of the Aegean archaeological period dates, partly to match the dendrochronology date for Thera. Bob Porter Ancient History Study Group, September 1992 Thanks are once again due to Clarice Morgan for providing a venue for this meeting, held on 26.9 .92, and for the marvellous refreshments which she invariably provides. The meeting was opened by David Roth talking about a recently published book, The Sign ...
72. 2nd SIS Cambridge Conference Abstracts [Journals] [SIS Internet Digest]
... researchers have found evidence for abrupt climate change and civilisation collapse as well as sudden sea level changes, catastrophic inundations, widespread seismic activity and abrupt changes in glacial features at around 2200 200 BC. Climatological proxy data together with sudden changes in lacustrine, fluvial and aeolian deposits are clearly detectable at the Atlantic-Subboreal boundary in the archaeological, geological and dendrochronological records from around the world. A survey of ~500 excavation reports, research papers and scientific abstracts on late 3rd Millennium BC civilisation collapse and climate change was carried out in order to assess i) the nature, ii) the extent and iii) the chronology of sudden climatic and social downturns at this particular chronozone. This comparative ...
73. Editor's Notes [Journals] [SIS Review]
... by 2,000 years and even in conventional circles there are moves to reduce it further, despite the fact that this conflicts with Carbon 14 dating which raises dates. Bob Porter, who agrees with much of David Rohl's work, argued that because of the increasing conflict with calibrated radiocarbon dates, there is need for full publication of the dendrochronologies which have been used. Bob discussed Megiddo and also what has come to be known as Hezekiah's Tunnel', arguing that this has been wrongly identified and that Hezekiah built the older tunnel found nearby. Aidan Dodson outlined the difficulties posed for the New Chronology by development of Third Intermediate period coffins. A distinctive type of yellow coffin came ...
74. The Earliest Arrival of Celts in the British Isles [Journals] [Kronos]
... A.D . The dating of these splits is highly problematic. Most differences of chronographic opinion are due to differences in dating method. Some prehistorians, like Jacquetta Hawkes, depend chiefly on stratigraphy.(12) Others, like Grahame Clark, prefer radiocarbon dating.(13) Still others, like Colin Renfrew, date events by dendrochronological re-calibration of radiometric results.(14) Other differences, however, are due less to technique than to basic assumption about the nature of diachronic change. Catastrophists, who assume radical discontinuity in protohistoric development, are inclined to prefer the "revised chronology" of Immanuel Velikovsky to all chronologies based on uniformitarian assumptions.(15) My ...
75. Society News [Journals] [SIS Review]
... fewer years had actually passed than suggested by the difference in dates. The history of the Jews shows centuries of darkness and discontinuity that support the thesis. For the Carolingian period, historians find only written sources, with no supporting archaeology. The paper also set out objections to the recent scientific' dating methods, such as radiocarbon dating and dendrochronology. Niemitz finally offers answers to the three key questions: 1. how was it possible to insert 300 years into history? 2. why was this done? and 3. how can the problem be exposed to a wider audience for discussion without being labelled a von Daniken of the Middle Ages'? Clark told us that the ...
76. Tunguska-Type Impacts Over the Pacific Basin Around the Year 1178 AD [Journals] [SIS Review]
... also the time of the great Justinian plague which decimated the population of the Mediterranean region, killing up to 90% according to some estimates (a major factor facilitating the Arab expansion some three generations later). Further indication of a severe climatic crisis around the year 540AD, due possibly to cometary effects, is found also in the Irish dendrochronological record [6 ]. New Zealand Maori legends From New Zealand two arguments come: first we have the Maori legends that, several centuries ago, fire came from the sky, burned most of the forests and killed the Moa birds (the Maori adamantly reject western scholars' opinion that over-hunting was the reason for the Moas' disappearance ...
77. Recent Developments in Near Eastern Archaeology [Journals] [SIS Review]
... our climate have become clearer (as also mentioned in C&CW 2005:1 , pp. 16-17). Although not spelt out in the Independent, this climate effect links to the sudden dip in the radiocarbon calibration curve from about 850-750 BC (but, as noted above, at least a century later due to probable errors in dendrochronology). It is cosmic rays that generate C14 in the upper atmosphere and if they increase (due to weak solar activity letting them through) then radiocarbon increases and the radiocarbon calibration curve takes a dip (see fig. 1). I don't think this does anything earth-shattering to help revised chronology but, if this theory is correct ...
78. An Integrated Model for an Earthwide Event at 2300 BC. Part II: The Climatological Evidence [Journals] [SIS Review]
... 1800 BC or 3800 BP on that chart, reflecting the approximate 500 year correction between radiocarbon and calendar years. As in the case of the archaeological evidence presented in my earlier article, all of the radiocarbon data expressed here is given as calendar year dates, either obtained directly from the sources of information, or derived from radiocarbon dates using dendrochronologic conversion tables based on the generally accepted conventions of a 5568 year carbon-14 isotope half-life, and with AD 1950 as the zero time reference [8 ]. The Climatological Scenario at 2300 BC Based on the palaeoclimatological evidence that is available to us at the present time, a number of investigators have attempted to establish a climatic scenario before and ...
79. An Integrated Model for an Earthwide Event at 2300 BC. Part I: The Archaeological Evidence [Journals] [SIS Review]
... hang on the strength of any single radiocarbon measurement; it is built on the cumulative clustering of a very large number of measurements around a particular point on the time track. As a point of information, all of my radiocarbon data is expressed as calendar year dates, either obtained directly from my information sources or derived from radiocarbon dates using dendrochronologic conversion tables based on the generally accepted conventions of a 5568 year carbon-14 isotope half-life, and AD 1950 as the zero time reference [1 ]. [* For a statistical approach to 14C dates applied to catastrophist studies see E. W. MacKie: "Radiocarbon Dates and Cultural Change", SISR III:4 (1979) ...
80. Bronze Age Multi-Site Destructions (A Preliminary Review) [Journals] [SIS Review]
... was due to drought. His theory was later given added credibility by an article in Antiquity [33], the authors of which included leading climatologists. It has also recently been taken up by Mike Baillie [34]. Baillie's interest stemmed from a series of 20 unusually narrow tree rings in his Irish bog oaks dated 1159-1140 BC in dendrochronology years. The 1159 BC event in NW Europe has been neatly tied scientifically and archaeologically to the third major eruption of the Icelandic volcano Hekla [35]. Whilst it is proven that the end of the Scottish Bronze Age was due to Hekla, it is not yet proven that the Near Eastern events were related, but it does ...
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