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Search results for: dendrochronolog* in all categories
128 results found.
13 pages of results. 21. Cosmic Catastrophes and the Origin of Megalithic Cultures [Journals] [SIS Review]
... 2000 years showed that C14 data are exposed to too many interference factors to be used as a basis for absolute dating. As long as doubtful procedures such as C14 and dendrochronology are only calibrated with each other, so that the faults of one method are transferred to the other, this is not the place to look for a basis for ... became ever more difficult to establish. The same drama was repeated from 1967, with even more serious consequences, in what is known as the second radiocarbon revolution. When dendrochronologists presented linked sequences of tree ring segments spanning 8200 years, the C14 measurements were calibrated with them. With surprise it was noted that the revolutionarily high C14 dates were ...
22. A Slice Through Time (dendrochronology and precision dating) by M. G. L. Baillie [Journals] [SIS Review]
... From: SIS Chronology & Catastrophism Review 1996:2 (May 1997) Home | Issue Contents REVIEWS A Slice Through Time (dendrochronology and precision dating) by M. G. L. Baillie Batsford, London, 1995 This is a book with a broad spectrum of appeal. It will interest students of the history of science; it is essential reading for those who wish to learn more about dendrochronology, of prime importance to those whose passion is chronology or the application of chronological techniques, and a gold mine for catastrophists of all persuasions. Historians have much to learn from its pages, especially art historians, Dark Age historians and Egyptologists, though whether they will rise ...
23. The present state of Radiocarbon Dating [Articles]
... been re-used and they were originally for buildings several hundred years older than the building they are now incorporated in and they have been re-used when the older building was pulled down. So unfortunately we have to view large numbers of our radiocarbon dates with extreme suspicion. Coming back to this question of calibration, for this we need to look at dendrochronology, tree ring dating. It was realized around the time of Leonardo da Vinci- he realized it actually- that trees contained annual growth rings and that the width of these rings varied according to the weather in any given year. Charles Babbage, the computer pioneer, realized the significance of potential cross-dating of different trees by using the ...
24. The Answer to Clapham's Question: Revise! [Journals] [Catastrophism & Ancient History]
... waters or for other reasons.51 Finally, despite the largely ignored old wood and Nile contamination problems, uncalibrated Egyptian radiocarbon dates are typically late. They are ostensibly brought into line with the conventional chronology by the application of tree-ring based calibrations of several hundred years. But I have shown substantial reasons to question the validity of the European oak dendrochronologies upon which the calibrations depend.52 Other than the correspondence between the European oak and Bristlecone pine calibrations, no solid scientific evidence permits insistence that the Bristlecone pine calibrations apply beyond the White Mountains of California. Until the European oak dendrochronologies were developed, scientists were uncertain whether the Bristlecone pine calibrations had worldwide application. Indeed, the European ...
25. The Great Wave by David Hacket Fischer [Journals] [SIS Review]
... while the other interregnum coincided with the beginnings of the Industrial Revolution, which sucked up surplus labour. The author also draws a connection with climate - the Little Ice Ages, famines and bad harvests. The importance of this book, it seems to me, is that the dates he assigns to these price changes actually match dates highlighted by dendrochronological blips in the weather (cf. Mike Baillie, A Slice Through Time, Batsford, 1996). Clearly, something was happening which affected prices and crop yields. Peasant revolts against millers and bakers, property owning elites and the great abbeys and monastic estates were a quite common consequence. Climate and price changes also affected music, ...
26. Heinsohn's Revised Chronology & Lynn Rose's Retrocalculations [Journals] [SIS Internet Digest]
... , President of the Institute for Nautical Archaeology, tells me that he personally excavated a bronze age' shipwreck and dated it around 1,300 BC by accepted stratigraphy methods (I assume, pottery-style indicia and the like), and now one of his best students, who has published his work in detail, has dated the wreck by dendrochronology to the same date, and the dendrochronology is "so objective that it is beyond sane dispute." In discussion I get the impression that George has personally checked published conventional Mediterranean dating back to 1,300 BC and believes that it would be impossible to find fault with it in any major way. From: Clark Whelton < ...
27. Recent Developments In Near Eastern Archaeology. C&C Review 2002:1 [Journals] [SIS Review]
... interesting to note that at least one ice core is wrong. Furthermore, the 1645 BC date is putting Thera more than a century outside the possible range of orthodox archaeological-historical dates (Thera = later Late Minoan IA = early Egyptian 18th Dynasty = c. 1520 BC?). A further twist is given by the latest revision of Anatolian dendrochronology. This dendrochronology does not reach all the way to the present, so the Bronze-Iron Age dendrochronology has to be located by taking carbon dates and wiggle matching' them to the international radiocarbon calibration curve. Originally this gave a +/ -37 year positioning; later it was fixed at precisely 26 years after the mid-position by identifying a ...
28. Editor's Notes [Journals] [SIS Review]
... Thera in this issue has potentially great significance for everyone working on ancient history (Recent Developments in Near Eastern Archaeology, p. 27). The eruption of Thera is a key marker in the history of civilisations around the Mediterranean and it gives the opportunity to link historical records and archaeological finds with the dates derived from tree ring studies (dendrochronology) and ice cores. The consensus' date for the eruption in recent years has been 1628BC - a date which suits the conventional chronology (although it is actually a little early for it) - but is much too early for the various revised chronologies which have been developed based on historical evidence. As Bob reports, the 1628BC ...
29. Letters [Journals] [SIS Review]
... one. As a result, small changes in the rate of radiocarbon formation in the atmosphere can generate disproportionate variations in its concentration and changes in the flows between the atmosphere and the two passive reservoirs (the oceans and the biosphere) can also dramatically affect it. However, these points do not materially affect the conclusions of my article. Dendrochronologists are due credit for their finding that radiocarbon levels are highly variable and that the radioactive dating calibration curve must be very wiggly. Thus uncalibrated radiocarbon dates are virtually useless, a conclusion which is surprisingly understated. The problem is that this in turn makes it more difficult to rely on ball park' radiocarbon dates to guide the tree-ring matching ...
30. Forum: Do the Early Middle Ages Survive Only as a Sacred Cow? C&C Review 2002:1 [Journals] [SIS Review]
... can see from these examples how many riddles are still present in conventional history and how many of them can be effortlessly solved. If Palmer thinks that the orthodox chronological paradigm, that particular sacred cow is still alive and well' [66], then this is only due to the fact that this paradigm has not been questioned sufficiently. Dendrochronology Dendrochronology per se is not to be dismissed. What should be generally remembered is that dendrochronology is not a method for absolute dating but only a method of calibrating conventional chronology (e .g . by using construction dates from the Middle Ages as well as from Roman times; this is done with the help of the C14 method which ...
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