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Search results for: radiocarbon in all categories
445 results found.
45 pages of results.
1. Calibrated Radiocarbon and the 'Methodological Fault-Line' [SIS C&C Review $]
... From: SIS Chronology& Catastrophism Review 1991 (Vol XIII) Home¦ Issue Contents Calibrated Radiocarbon and the 'Methodological Fault-Line' by Bernard Newgrosh As long ago as 1979 the distinguished pre-historian James Mellaart tried to propose a stretched history to accommodate the results of calibrated radiocarbon dating [1. He was criticised by J. Weinstein [2 and B. J. Kemp [3 and withdrew his proposals [4 and the exercise was not repeated. But the problem for pre-historians remains: in the third millennium BC and earlier the application of calibrated radiocarbon dates causes horrible problems for chronology. Thus F. Hole, writing in 1987, summarised the 8000-6000 BP period in Mesopotamia and complained of a subsequent 1000 year 'dark age' created by the application of calibrated radiocarbon dates: "In view of the prevailing lack of sites ascribed to this phase, not to mention the lack of stratigraphic evidence for a substantial gap time [sic, we can hardly be comfortable with the situation: a chronological "fault-line" on either side of which exist abundant sites, but across ...
2. Thera: Chronology at a Crossroads? [SIS C&C Workshop $]
... and archaeologists have used this pottery as a means for dating the major second millennium BC eruption. The Late Minoan IA period has thus been dated to 1550-1500 BC, and the eruption of Thera dated to 1500 BC. This dating, it must be stressed, is purely an archaeological one. As its basis we find the dating of Mycenaean pottery in Egyptian New Kingdom contexts, and through the dating of Mycenaean wares the pottery style chronologies of the Late Minoan I and Late Cycladic I sequences are determined. In the early years of radiocarbon dating this archaeological date appeared to be confirmed: radiocarbon estimations were performed on material from the Thera eruption levels and dates of around 1500 BC were obtained [1. The confirmation afforded by the radiocarbon dates was independent of the pottery style chronology, and archaeologists were happy to accept it. A later confirmation was offered by the ice core records from Greenland. A core taken from north-central Greenland (the Camp Century core) was studied for peaks in acidity in its ice, and these were compared to the known major volcanic eruptions ...
3. Radiocarbon Dating: An Archaeological Perspective [SIS C&C Workshop $]
... From: SIS Chronology and Catastrophism Workshop 1992 No 1 (Aug 1992) Home¦ Issue Contents REVIEWS Radiocarbon Dating: An Archaeological Perspective by R. E. Taylor, (London: Academic Press, 1987) Anyone concerned with ancient history and chronologies cannot ignore radiocarbon dating results. Unfortunately, the technical nature of the subject causes misunderstanding among scholars and archaeologists about how radiocarbon dating is accomplished and the meaning and limitations of radiocarbon measurements. Indeed, as was recently observed by Bowman and Balaam in Antiquity 64 (1990), pp. 315-318: 'The way in which radiocarbon results are used varies tremendously. There is a lamentable tendency to ignore or play down the importance of context in publication, especially secondary publication.' R. E. Taylor's Radiocarbon Dating: An Archaeological Perspective serves the very useful purpose of explaining the theory, methods, terminology, conventions, limitations, and other technical aspects of radiocarbon dating in a clear manner and with footnotes and references to important articles on each of the topics covered. Persons with an interest in ancient chronologies should ...
... From: Pensée Vol. 3 No 2: (Spring-Summer 1973) "Immanuel Velikovsky Reconsidered IV" Home¦ Issue Contents Radiocarbon Dating and Velikovskian Catastrophism Thomas Mowles Evidence supporting 'Worlds in Collision' Thomas Mowles is an engineer, Inorganic Materials Research Division, Lawrence Berkeley Laboratory, Berkeley, California. 1. INTRODUCTION In Worlds in Collision Velikovsky proposed a physical, catastrophic hypothesis based primarily upon historical evidences (1). Scientists, however, will not accept such a hypothesis unless the physical evidence is compelling, and historians are not likely to interpret their own data in opposition to the "laws of science." Nor will purely theoretical models carry much weight in supporting so revolutionary a hypothesis as Velikovsky's. Therefore, it is necessary to measure physical parameters reliably recorded in the past and currently available for accurate analysis. The radiocarbon dating method offers such parameters, provided its basic premises can be verified. Moreover, since Velikovsky's hypothesis proposes profound geophysical changes, a geophysically-independent "clock" is required to test his claims, and only radioactive carbon decay promises that independence ...
5. Radiocarbon Dating and Egyptian Chronology [SIS C&C Review $]
... From: SIS Review Vol VI No 1-3 (1982) "The 1978 Glasgow Conference Proceedings" Home¦ Issue Contents Radiocarbon Dating and Egyptian Chronology Dr Euan Mackie I don't regard myself as an expert in ancient Egypt or the ancient Near East- or even, really, in radiocarbon dating, but as a practising archaeologist I have to use radiocarbon dates in this remote northern region far from the centres of early civilisation in the Mediterranean and the Near East, and therefore, like everyone who works up here, beyond the range of direct links with Egypt and Greece, I have to be familiar with C14, its limitations and its benefits [1. It occurred to me some time ago- and, of course, to others as well, including Dr Velikovsky himself- that it was really going to be the C14 evidence which would provide the crucial test for his revised chronology [2. Even ten years ago, the carbon dates available for ancient Egypt were very few: too few to come to any definite conclusion one way or the other. ...
6. Scientific Dating Methods In Ruins [The Velikovskian $]
... to overcome chronological problems. In this respect, we are told that there are scientific methodologies that can give absolute dates of great specificity, validating, clearly, the historical chronology established over the past century. Recently, William H. Stiebing, Jr., in his criticism of Gunnar Heinsohn's revised chronology, has offered his support of these methods as an assurance of evidence good enough to support the established chronology. (3) What Stiebing offers, in part, to refute the historical revisions, are four scientific dating methods: radiocarbon (C-14) dating, dendrochronology, thermoluminescence and stratigraphy. These methodologies are, according to Stiebing, in full agreement with the established chronology and, therefore, cannot be invoked to support major revisions of ancient history. I will show that Stiebing's assurances are clearly unsupported by the evidence. The fundamental experimental evidence presented by investigators in each of these fields tells a much different story. When they point to this negative evidence, authorities disagree with Stiebing's conclusions vehemently and unambiguously. Since absolute dating has become one cornerstone validating the correctness ...
7. The Radiocarbon Dating Method [Pensee]
... From: Pensée Vol. 3 No 2: (Spring-Summer 1973) "Immanuel Velikovsky Reconsidered IV" Home¦ Issue Contents The Radiocarbon Dating Method W. F. Libby A 'state of the method' report, by its inventor Professor Libby received the Nobel Prize in 1960 for his work in developing the radiocarbon dating method. A recipient of numerous other honors, Libby is currently director, Institute of Geophysics and Planetary Physics, University of California, Los Angeles. This research was sponsored by the National Science Foundation under Grant No. GA-628, Contribution No. 3101 from the Department of Chemistry, UCLA. W. F. Libby Radiocarbon dating is a measurement of the age of dead matter by comparing the radiocarbon content with that in living matter. Radiocarbon (radioactive carbon C 14) is produced by the cosmic rays in the atmosphere and is assimilated only by living beings. At death, the assimilation process stops and the immutable radioactive decay loss no longer is compensated by the intake in food. The average life of a radiocarbon atom is 8,300 ...
8. Ash [Pensee]
... From: Pensée Vol. 4 No 1: (Winter 1973-74) "Immanuel Velikovsky Reconsidered VI" Home¦ Issue Contents Ash "Ash "-the short monosyllable suggests not only the physical end product of radiocarbon tests, but also something of the asperity engendered by prolonged attempts to have them made and interpreted. So much labor of mobilization, it seems, for such ambiguous results. And yet the story, which is often one of frustration, has its moments of triumph. At the least, as Velikovsky remarked to one of his correspondents, it "reads like a very adventurous tale." Copyright 1974 Immanuel Velikovsky Our aims in publishing these letters are several. The letters themselves comprise a historical record of more than a little interest to the historians and sociologists of science, who may well glean from them insights into the peculiar obstacles facing the bearer of unwelcome or unapproved views, should he attempt to secure objective tests of those views. More than one critic has chastised Velikovsky for his supposed failure to seek scientific means of arbitration between his own and accepted ...
9. Ice Cores and Catastrophism [SIS C&C Workshop $]
... (7) 3150 90 BC, etc. It should be further added that these were the only significant major maxima in this core. The maximum at 1120 50 BC was attributed to the "greatest post-glacial eruption of Hekla" (Iceland), that at 1390 50 BC to Thera, and that at 2690 80 BC to an earlier eruption of Hekla. The matter of assigning these acid maxima is well worth scrutiny. In the case of the maxima at 1120 50 and 2690 80 the dates derived were matched up with the radiocarbon date yielded by ash from the Hekla volcano. Hekla (H3) had given a radiocarbon date of 950 130 BC and this was found to be in agreement with the ice core date of 1120 50 BC: Hekla (H4) had been radiocarbon dated to 2550 120 BC and this corresponded to the ice core date of 2690 80 BC.(8) However, in assigning their 1390 50 BC maximum Hammer et al. noted that this would correspond to the circa 1400 BC date derived from "Egyptian pottery style chronology ...
10. The Answer to Clapham's Question: Revise! [Catastrophism & Ancient History Journal $]
... From: Catastrophism and Ancient History XV:1 (Jan 1993) Home¦ Issue Contents The Answer to Clapham's Question: Revise! Jesse E. Lasken Phillip Clapham may be correct that Biblical chronologies are imperfect (C&AH 14, 1), but his reliance on conventional Near Eastern chronologies to support his proposed corrections is misguided. Clapham asserts the basic accuracy of the conventional chronologies based on nothing more than an undocumented assertion concerning the radiocarbon evidence. While many conventional chronologists claim the radiocarbon evidence confirms the conventional chronologies, objective analysis suggests the opposite. Typically, those who use radiocarbon results to defend the Egyptian chronology ignore the "old wood" problem, misuse statistics, and rely upon dubious methodologies to make the data fit. 49 If they studied the data more carefully they would find that comparisons of radiocarbon dates from associated Egyptian materials indicate that the Egyptians regularly used quite old wood. 50 Such comparisons indicate that the typical wood radiocarbon date from Egypt is probably some 300 or 400 years earlier than the true historical date, and in some cases ...
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