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Search results for: dendrochronolog in all categories
117 results found.
12 pages of results. 31. Society News [Journals] [SIS Workshop]
... ' over that period breaks the established pattern. If, by contrast, the calibration is re-drawn assuming 750 = 400 BC, the pattern is restored and the anomaly eliminated. A date c.1160 BC for the eruption of Thera would then be consistent with the scientific chronologies. [But see M. G. L. Baillie: Dendrochronology and Thera: The Scientific Case', JACF 4 (1990/91), pp. 15-27.] After some discussion of Wayne Mitchell's astronomically derived dates [W . A. Mitchell: Ancient Astronomical Observations and Near Eastern Chronology', JACF 3 (1989/90), pp. 7-26], which suggest that Neferhotep ...
32. Catastrophes in the period 5th cent. BC to 14th cent. AD [Journals] [SIS Review]
... :1 ) ends, I would reiterate my C&C Review (XVIII, 1991) conclusion with regard to catastrophes between the 5th and 12th centuries AD. If the theory (of Clube & Napier) requires them, the theory is wrong'. Since 1994, Baillie's A Slice Through Time has been published [1 ] and dendrochronology may actually support Clube and Napier. Baillie [2 ] has isolated a tree ring frost signature at 536-8 AD - unarguable evidence for a dust veil event .. . during the lifetime of the much maligned Gildas [3 ]. Clube and Napier interpreted Gildas's talk of death and destruction as a description of a catastrophe. However, ...
33. Uniformitarian Or Catastrophist? Ice Age Theory [Journals] [Velikovskian]
... be the ones best corroborated by coral growth bands. Both are based on comparison of carbon-14 to carbon-12 ratios. Nevertheless, pre-1950 to the 1700's coral growth bands from Bermuda and the Florida Keys are in stark contradiction to those of tree rings for the same period.36 That is, we now have another climate chronology that contradicts that of dendrochronology! Therefore, the period assigned to frost rings of Irish bog oaks and European trees as well as to bristlecone pines may be off by a few hundred years. In view of this evidence, this is not an unreasonable probability. Thus, the narrow ring timeline would then be in agreement with Velikovsky's chronology. The varve record undeniably ...
34. The Ages of Bristlecone Pine [Journals] [Pensee]
... a photosynthetic capacity for spanning many years of stressful conditions (2 ). Whatever the reasons for their success in survival, there can be little doubt that these trees are the oldest living things. The study of their wood is pertinent to climatology as well as chronology. Background of Tree-Ring Dating The techniques and theories of tree ring dating (dendrochronology) have their foundation in the work of A.E . Douglass in the early part of this century (3 ). Douglass and his successors, Glock, Shulman, et al., were interested in climatic variations over long periods of time and turned to the examination of the variation in width of annual growth rings as a ...
35. Letters [Journals] [SIS Review]
... triggered by comet Encke (or a near relative) colliding, or nearly colliding, with the sun, rather than with any individual planet. Michael Reade, Checkendon, Oxfordshire Reply to Baillie I would like to reply to Prof. Mike Baillie's letter in C&C Workshop 1995:1 (p . 38). The additional local dendrochronologies which he mentions do reinforce the younger end of the Irish BC chronology but they do nothing to improve the low t-values linking Ireland to Carlisle and Carlisle to Southwark (which then links back to the AD Irish chronology). This can be seen by adding the new local chronologies to Baillie's diagram on p. 17 of JACF 4. ...
36. Velikovsky and Catastrophism: A Hidden Agenda? [Journals] [SIS Review]
... , 1978 idem: Mankind in Amnesia, New York & London, 1982 idem: Stargazers and Gravediggers: Memoirs to Worlds in Collision', New York, 1983 Clark Whelton: Velikovsky, Fundamentalism, and the Revised Chronology', paper delivered at the Seventh Annual CSIS Seminar, Haliburton, Ontario, August 1987: Revised 1989 C14, Dendrochronology and the 18th Dynasty (a development of some ideas of Bernard Newgrosh in Review XIII, p. 36) Firstly the bad news: it looks like calibrated radiocarbon dates agree with the conventional chronology in the 14th century BC. Some calibrated C14 results from Tell el-Amarna [1 ] give good agreement with the historical dates for Akhenaten ( ...
37. The Homeric Question [Journals] [SIS Review]
... , 1984 p. 1. 40. This proposal is a research hypothesis which calls for careful scrutiny. While my revised date for the Homeric age rests entirely on Greek written documents and archaeological evidence, the conclusion with regard to revising Greek Bronze Age chronology is still highly speculative. In particular, more reliable scientific dating methods, such as dendrochronology, could easily prove all arguments brought forward for a fundamental revision of Bronze Age chronology wrong. If it can be convincingly disproved, I will be the first to accept the inevitable outcome and drop my claims. If, on the other hand, it cannot be invalidated by convincing data, a re-assessment of Gunnar Heinsohn's proposed revision of ...
38. Challenges to Evolutionary Gradualism [Books]
... , and so results will depend on the concentration of carbon-14 in the atmosphere when the animal or plant was alive (a likely variable), as well as on the decay of carbon-14 to nitrogen-14 in the tissues after death [14]. Radiocarbon dates for the most recent few thousand years have been calibrated by association with tree-ring dating (dendrochronology) [55,56], but even then some have argued that problems persist [57]. The radiocarbon time-scale over the past 30,000 years has been calibrated against the uranium-thorium ages of Barbados corals: the three youngest specimens used were within the range of tree-ring calibration and there was good agreement between the radiocarbon dates adjusted ...
39. Recent Developments in Near Eastern Archaeology [Journals] [SIS Review]
... on to say, as already mentioned above (but it is worth repeating), at the present stage of research, it seems wise not to mix historical with radiocarbon chronology, but to use them in opposition to each other until such time as the phenomenon of divergence can be better understood and explained. ' 7) Bietak challenges Kuniholm's dendrochronology, noting that matches are claimed between different tree species living in different meteorological areas, and that the minimal published data does not allow the dendrochronology to be checked (cols. 221-222). The area where I feel that Bietak does not go far enough is his own dating of the town area at Daba. He still insists that ...
40. Misusing Radiocarbon: A Case Study [Journals] [SIS Review]
... cases, it will be found that these outside dates are inconsistent with and yielding dates older than the conventional chronology. Notes and References 1. J. E. Lasken: Towards a New Chronology of Ancient Egypt', Discussions in Egyptology 17 [1990], pp. 89-141. For a more detailed discussion of the validity of the dendrochronological calibrations see, also, J. E. Lasken: Should the European Oak Dendrochronologies be Re-examined? ', C & C Review XIII [1991], pp. 30-36; idem: Discrepancies Between Chinese Historical and Calibrated C14 Dates', Catastrophism & Ancient History Newsletter 2(3 ) [1991], pp. 1-4; ...
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