How to use radiocarbon in a sentence

Looking for sentences and phrases with the word radiocarbon? Here are some examples.

Sentence Examples To note, the radiocarbon dating of organic ethnographic material is restricted to objects that are more than 200 years old. The researchers used radiocarbon dating on 22 pieces of microscopic charcoal found among Neandertal tools in fire pits in Gorham Cave. Three different laboratories produced radiocarbon dates for animal bones and charcoal at the four caves. After washing and drying, it was combusted to recover any carbon dioxide for the radiocarbon analysis. From radiocarbon to luminescence, uranium-series and electron spin resonance, the results were the same. The presence of alizarin dye and red lakes in the Raes and radiocarbon samples indicates that the color has been manipulated. The sample selected for the radiocarbon dating was a strip taken from the bottom left-hand edge of the linen cloth. Modern scientific techniques, especially radiocarbon dating, are helpful, but the margin of error is still too large. Subsequent radiocarbon dating of the bones and tools proved that they were as old as Kennewick Man and of immense value to archaeology. Also contamination of an object with more recent radiocarbon, leading to an inaccurate date, is always a threat and difficult to detect. These data were compared with the distribution of radiocarbon in free glucose and fructose isolated from the same sample. In fact, when calibrated against 14 C, the method has been shown to be more precise for the last 350 years than the radiocarbon dating alone. Contrary to Garrison's suggestion, radiocarbon dating is not the only discovery to truly revolutionize archaeology or archaeological dating. The date was provided by statistical analysis of the results of a combination of dendrochronology and radiocarbon dating. Because radiocarbon dating is only accurate to about 50,000 years ago, it couldn't be used to date Little Foot. Because radiocarbon dating is destructive, the plant remains to be dated were first submitted to David Asch for taxonomic identification. But the excavations did reveal that the building had burnt down, so charcoal was available for radiocarbon dating. These hypotheses are tested with a combination of radiocarbon dating and thermoluminescence dating. Although demonstrating that the fossil wood cannot be millions of years old, the radiocarbon dating has not provided its true age. The National Trust also provided funding for radiocarbon dating of the hurdle that turned out to date from the early bronze age. Show More Sentences Using radiocarbon dating, Pitulko established them to be more than 30,000 years old. A lack of organic remains associated with the inscription rendered radiocarbon dating impossible. Numerous charcoal samples were recovered for radiocarbon dating. A strong motivation for the inventors was the improvement of radiocarbon dating. The method makes use of PSI's innovative accelerator mass spectrometer which allows radiocarbon dating to be carried out on ultra-small samples. Stratigraphic and radiocarbon information can be used to give direction to the order produced through seriation and to begin to construct an absolute chronology. The age of tree stumps such as these can be determined using the radiocarbon dating technique. Most all investigators accept these radiocarbon dates on the elk antlers as rock solid. Dwellings may also be datable by radiocarbon methods using food bones or hearth charcoal. Ceramic analysis and radiocarbon dating have proved that the flow occurred at about the beginning of the Common Era. It turns out that radiocarbon also becomes incorporated in growing teeth and is retained for the remaining life of the animal. High density sampling for radiocarbon and magnetic secular dating provided excellent chronological control on this core. Archaeologists using radiocarbon data found that the Waraus were the first Amerindian tribe to have settled in Guyana more than 11,000 years ago. To obtain a sample that was large enough for radiocarbon dating, paper was cut along the sides of the label. An investigator of physics might not need the historian but a historian definitely needs the physicist for radiocarbon dating. Their age, determined by radiocarbon dating, revealed that they were roughly 700 years old. Recently, he published the results of a comparison between radiocarbon dating and a second technique, known as optical dating, carried out by a geochronologist. In chronological terms, Paviland is early in the European series of burials and is actually the earliest with a firm radiocarbon date measured directly on human bone. The youngest Iskut River lava flows have not been dated successfully, but are younger than a flow dated at 2555 radiocarbon years before present. The radiocarbon dating of the Mladec assemblage confirms that they derived from the time period of the middle to late Aurignacian of Central Europe. Show More Sentences Could modern human DNA contamination affect the resultant radiocarbon date? Living organisms acquire a characteristic minor fraction of radiocarbon by equilibrating with the carbon dioxide of ambient air or surrounding waters. After the organism dies and becomes a fossil, carbon-14 continues to decay without being replaced. To measure the amount of radiocarbon left in a fossil. Long ago, when I was an active spelunker, it had occurred to me that radiocarbon techniques ought to be applicable to the dating of secondary deposits in limestone caves. The eruptions dates are estimated using radiocarbon dating techniques and may be subject to refinement over time. The bluefin tuna is long-lived with a lifespan of up to 40 years, as recent studies using radiocarbon dating have shown. The development of radiocarbon dating and the discovery of DNA had a seismic effect upon archaeology. This material is not typical of eastern Palaeo-Indian assemblages and eight radiocarbon determinations date it to the period between 17000 and 11000 years ago. Samples of subsurface peat deposits were also made outside the park to determine the age and composition of sub-fossil mosses that will be radiocarbon dated. Recent radiocarbon dating indicates that populations survived as recently as 8,000 BC in western Siberia. However, the accuracy of this date is uncertain, as several radiocarbon plateaus exist around this time. Renewed excavations at Harappa from 1986 onwards and at several other sites have produced a series of radiocarbon dates. It has been given a calibrated radiocarbon date of 4040 BC to 3640 BC and is on display in the National Museum of Scotland. For relatively recent periods data from radiocarbon dating and dendrochronology also support the MIS data. Research in Switzerland, southern Germany, and Belgium has provided AMS radiocarbon dating to support this. However, more recent radiocarbon dating of seashell fragments and lead contamination predate this claim by two millennia. In 2004, worked stone tools were found at Topper in South Carolina that have been dated by radiocarbon techniques possibly to 50,000 years ago. Two uncalibrated radiocarbon dates on carbon from the hearths came in at approximately 24,000 and 22,000 years ago. For an introduction to the radiocarbon dating techniques used by archaeologists and geologists, see radiocarbon dating. Certain types of evidence dependent on organic material, such as radiocarbon dating, may be destroyed by submergence. Show More Sentences The UA's Accelerator Mass Spectrometry Laboratory used radiocarbon dating to determine the age of the Siberian skull. Direct radiocarbon dating of prehistoric cave paintings by accelerator mass spectrometry. Archaeomagnetic samples, though inconclusive, were compatible with surprisingly early radiocarbon dates. Deglaciation history is fairly well known because it is based on mapped glacial landforms, such as end moraines and drumlins and it is constrained by radiocarbon dates. The average time water spends in the deep ocean before it returns to the surface is about 500 years, as shown by radiocarbon dating of dissolved carbon compounds. There will be dendrochronology and there will be radiocarbon dating. The spread in the radiocarbon dating indicates at least two possibilities. The age of the remains can be approximated from radiocarbon dating. When larger dates are cited, they come from radiocarbon dating, from methods other than written human records, or from Manetho's Egyptian king-list, which is highly suspect. Radiocarbon dating indicates that the northern lobe was deposited about 1890 radiocarbon years ago and the larger eastern lobe, about 1250 radiocarbon years ago. It is compiled by Dr. Richard Morlan of the Canadian Museum of Civilization, whose purpose was to improve our understanding and use of radiocarbon dating by compiling and evaluating the analyses. But if it is to find out whether the death of an organism has occurred a short time or several decades ago radiocarbon dating is principally not able to show unambiguous results for certain time periods. Between 1979 and 2002 reports have been published on the human and faunal remains, Chinese porcelain, gold objects, glass beads and radiocarbon dating. This sample was submitted to Roelf Beukens at IsoTrace Laboratory, a laboratory affiliated with the University of Toronto that specializes in radiocarbon dating. Quality controlled radiocarbon dating of bones and charcoal from the early Pre-Pottery Neolithic B of Motza. The radiocarbon data also shows that the Caribs came and settled in Guyana about 7,000 years ago, while the Arawaks settled approximately 3,500 years ago. They used radiocarbon dating to find out how old the map's parchment is. Unlike traditional radiocarbon dating, which can be bought off the shelf, Dr Bayliss reckons it takes between three and four years to train a graduate researcher to use the new technique properly. Unconfirmed aboriginal legends from the area suggest that the eruption that occurred 1250 radiocarbon years ago disrupted food supplies and forced aboriginal people to migrate southward. The developments of radiocarbon dating and dendrochronology have done much to further knowledge in this area. Show More Sentences The GSC laboratory was unique amongst radiocarbon laboratories in that it guaranteed that all dates and sample information would be made available to the Quaternary community. These maps show the extent of glacier ice in Atlantic Canada from the last glacial maximum until 12,000 radiocarbon years ago. Ice cover is indicated by a transparent white tone. A radiocarbon date of between 50 BC and AD 70 was obtained from charcoal recovered from its infill. Although radiocarbon dating can provide a rough estimate, this is not accurate enough to associate archaeological finds with historical events. The BP scale is sometimes used for dates established by means other than radiocarbon dating, such as stratigraphy. The Happisburgh site is too old to date using radiocarbon dating, which is not suitable for sites older than approximately 50,000 years. Archaeologists' most precise determinations at present suggest that this radiocarbon age is equal to roughly 13,200 to 12,900 calendar years ago. There's also the Aubrey site in Denton County, Texas, which produced a radiocarbon date that is almost identical. However, this same shift in the radiocarbon signal predates the start of Younger Dryas at Lake Suigetsu by a few hundred years. This is at least partly due to an inadequacy of materials suitable for radiocarbon dating that can be reliably obtained from the sites. However, in this application, scientists used the pulse of radiocarbon to analyze fat cell turnover in humans. New research contradicts radiocarbon dating tests carried out in the 1988 which concluded the pure linen sheet was a medieval fake. Samples of the remains have been sent for radiocarbon dating but it is thought they could date back as far as the Medieval or Famine period. Clearly, further chronometric evidence, both in the form of additional radiocarbon dates and more detailed analyses, is required. An ANTIQUITY paper used the methods of Bayesian statistics to combine radiocarbon and stratigraphic information into a single considered view. However foraminifera and corals are marine organisms, and so reflect the radiocarbon concentration in particular regions of the ocean. Now it seems likely to be Sivadeva II, if at all, since his regnal dates in part overlap the radiocarbon dates, 690-890, assigned to some of the carvings within. Based on radiocarbon dating of roughly 150 samples of dead plant material with roots intact, collected from beneath ice caps on Baffin Island and Iceland, Miller et al. It had been thought that the Randolphfield standing stones were more than 3000 years old but recent radiocarbon dating suggests they may date from the time of Bruce. The older curves show up to five transgressional waves during the Litorina Sea and Limnea Sea stages, however, these fluctuations are not radiocarbon dated. Show More Sentences Hundreds of radiocarbon dates have been acquired and have been calibrated on four different curves, the most precise being based on tree ring sequences. According to Sundell, Dee is the largest Columbian mammoth ever found in the world, with the bones dated at 11,600 years old by radiocarbon dating methods. Now, more than thirty years later, we scrutinized the site's osteological assemblage and ordered radiocarbon dating for a selection of human bones. Prior investigations of changes in the direction of drainage and their chronology were based on ancient shorelines, varve clay counts and radiocarbon datings. Similarly, radiocarbon dating of American east coastal subfossil remains confirm that gray whales existed there at least through the 17th century. Human remains, sometimes accompanied by artefacts, have been found in or close to the dolmens which could be scientifically dated using radiocarbon dating. The 3,000 to 5,000 radiocarbon year gap between the Solutrean period of France and Spain and the Clovis of the New World also makes such a connection problematic. Rogers, very recently deceased, who discovered that in the very area used to provide samples for the radiocarbon test, the Shroud linen had been mended. The diversity of radiocarbon evidence may also suggest that stone circles were constructed over a very long period, or were sometimes reconstructed at later dates. His absolute chronology has held up well against radiocarbon dating, with the exception that the period's start is closer to 1700 BC than 1800 BC, as Montelius suggested. Examples from Classical Literature Some of the carbon compounds in the various artifacts showed a faint trace of radiocarbon, others showed none. Philon went on to explain the radiocarbon dating of the book. Stanley and Sheng dated the grains by interpolating the radiocarbon dates of core mud layers lying 1 meter above and below the ash layers. A National Science Foundation grant allowed for radiocarbon dating of three samples, one side rib and two of the umiak's bottom crosspieces. They have been studied in situ by an osteologist from York University who has taken measurements and is radiocarbon dating the bones to find out when these people lived. 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Words that rhyme with radiocarbon What is the plural of radiocarbon? Use our Sentence Generator Nearby Words radiobiology radiobiologist radiobiological radioactivity radioactively radioactive decay radiocarbon dating radiochemical radiochemistry radio-controlled radioed radiofrequency 11-letter Words Starting With r ra rad radi radio radioc radioca radiocar radiocarb radiocarbo