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Search results for: dendrochronolog in all categories
117 results found.
12 pages of results. 51. Acknowledgments (Earth In Upheaval) [Velikovsky] [Velikovsky Earth in Upheaval]
... at his death (our last meeting was nine days before his passing) there remained clearly defined points of disagreement, his stand then demonstrated the evolution of his opinion in the space of eighteen months. Professor Waldo S. Glock, Chairman of the Department of Geology at Macalester College, St. Paul, Minnesota, a recognized authority in dendrochronology (dating of tree rings), with the help of his graduate students searched the literature pertaining to the tree rings of early ages, and also gave me answers to questions in his field. Dr. H. Manley of the Imperial College, London, Professor P. L. Mercanton of the University of Lausanne, and Professor ...
52. An Integrated Model for an Earthwide Event at 2300 BC. Part II: The Geological Evidence [Journals] [SIS Review]
... along boundaries of oceans, lakes and rivers, on organic material adjacent to volcanic tephra (dust) or lava, and on organic material associated with objects undergoing thermoremanent magnetism measurements. As in the earlier articles, all of my radiocarbon data is expressed in calendar year dates, either obtained directly from my sources or derived from radiocarbon dates using dendrochronologic conversion tables based on the accepted conventions of a 5568 year carbon-14 isotope half-life, and AD 1950 as the zero time reference [1 ]. Chronological data is presented in figures designated in either radiocarbon or calendar years, just as in the climatology article. The calendar year 2300 BC point appears in each figure. Figure 1. Global ...
53. International Workshop Tunguska96 [Journals] [SIS Internet Digest]
... the Russian Academy of Sciences) The Tunguska event: what we know today and what we hope to learn soon. W. H. Fast (Tomsk Univ.) G. Longo (Bologna Univ.) The testimony of the surviving Tunguska trees. V. D. Nesvetajlo (Tomsk Univ.) Consequences of the Tunguska catastrophe: dendrochronologic inferences. E. M. Kolesnikov (Moscow Univ.) Chemical and isotopic investigation of peat and spherules from the Tunguska region. R. Rocchia (CFR, CEA/CNRS, Gif-sur-Yvette, France) Search for Iridium and extraterrestrial particles in polar snow and on the Tunguska site. G. V. Andreev (Tomsk Univ. ...
54. Predicting the Past (advert) [Journals] [SIS Review]
... for further discussion. Today, the tide has turned somewhat. School children are taught that the extinction of the dinosaurs was due to the crashing to Earth of a comet or an asteroid sixty million years ago. Astronomers have written books about how asteroid and comet impacts destroyed past civilisations and threaten our present one. Experts in the field of dendrochronology have concluded that treering data show steep environmental downturns within historical times and that these events seem to be tied to celestial phenomena. The present work is a summation of Roger Wescott's thoughts regarding mythology, human prehistory, and catastrophism. Not only are the ideas presented in this work incendiary; they are also educative. Beyond its considerable value ...
55. Perilous Planet Earth: Catastrophes and Catastrophism Through the Ages by Trevor Palmer. [Journals] [SIS Review]
... All three new theories weakened the dominance of the gradualist geologists and similar changes happened in evolution with the contributions of Eldridge and Gould, which led to the theory of Punctuated Equilibria, in which long periods of gradual development are interrupted by short periods of sudden change. In section C, Palmer briefly describes radiometric dating methods, radiocarbon dating and dendrochronology, illustrating how these have influenced our concept of age. The need to accommodate the concept of gene maps and the rate of mutation has also forced evolution to evolve. Similarly, the need to accommodate the results of space exploration and super-computer calculations is forcing changes in our model of the solar system. Though, of course, the ...
56. Climate changes [Journals] [SIS Review]
... became warm and drier and the bogs of Europe became overgrown with pine and yew. For a short time the climate was extremely dry and some lakes seem to have shrivelled up altogether. In fact, Swedish peat bogs display evidence of five very dry layers at interesting dates in the historical past, which appear to tie in very nicely with dendrochronology evidence: around 2300BC (the end of EB age catastrophe), 1200BC (the end of LB age catastrophe) and 600BC (a very dry period known from late Assyrian sources). This coincided with Arab bedouin migrations, Scythian and Cimmerian movements in the Caucasus, and the great Celtic penetrations out of the Danube basin. Indeed ...
57. Predicting The Past [Journals] [SIS Internet Digest]
... further discussion. Today, the tide has turned somewhat. Now school children are taught that the extinction of the dinosaurs was due to the crashing to Earth of a comet or an asteroid sixty million years ago. Astronomers have written books about how asteroid and comet impacts destroyed past civilizations and threaten our present one. Experts in the field of dendrochronology have concluded that tree-ring data show steep environmental downturns within historical times, and that these events seem to be tied to celestial phenomena. The present work is a summation of Roger Wescottıs thoughts regarding mythology, human prehistory, and catastrophism. Not only are the ideas presented in this work incendiary; they are also educative. But, beyond ...
58. The Great 250,000 Year Ice Core [Journals] [SIS Workshop]
... time (Beal after Burroughs) Before getting too agitated, it pays to look carefully at what exactly the scientists have found and consider the reliability of their evidence. Much play is made about the (presumed) annual layers visible in the ice and their similarity to tree rings. In view of what we now know about the various tree-ring dendrochronologies, a degree of scepticism is in order. It may be surprising to learn that only a small portion of the GRIP core was actually dated by counting layers: according to the report in Science [3 ] It is possible to count annual layers back at least 13,000 years'. (Note the words it is possible ...
59. Predicting the Past [Journals] [Aeon]
... further discussion. Today, the tide has turned somewhat. Now school children are taught that the extinction of the dinosaurs was due to the crashing to Earth of a comet or an asteroid sixty million years ago. Astronomers have written books about how asteroid and comet impacts destroyed past civilizations and threaten our present one. Experts in the field of dendrochronology have concluded that tree-ring data show steep environmental downturns within historical times, and that these events seem to be tied to celestial phenomena. The present work is a summation of Roger Wescott's thoughts regarding mythology, human prehistory, and catastrophism. Not only are the ideas presented in this work incendiary; they are also educative. But, beyond ...
60. Letters [Journals] [SIS Workshop]
... and the Amarna Pharaohs'? Margaret Grant, London SW7 Tille Hoyuk tree ring dates - Baillie responds I am sorry to see Bob Porter still worrying away at the shorten world chronology' red herring (C &C Workshop 1994:1 p. 20). I have tried to make clear to various people that attempting to discredit European dendrochronology is an uphill task because of the replicated nature of the system. If two scientists get the same answer in an experiment, then anyone disagreeing with that answer has only one option - redo the experiment. In our case, dendrochronologists have not only replicated the oak chronologies, they have independently replicated the bristlecone chronologies. Moreover, dendrochronology ...
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