快好知 kuaihz


radiocarbon dating造句
1. The most frequently used method is radiocarbon dating. 2. But several factors affect the accuracy of radiocarbon dating. 3. This is the basis of conventional radiocarbon dating. 4. Most errors in radiocarbon dating arise because the excavator has not fully understood the formation processes of the context in question. 5. Just as dramatically, radiocarbon dating has shown that the Neolithic was introduced to Britain at least 1500 years earlier than previously believed. 6. All of the caveats that apply to radiocarbon dating apply to its use in authentication. 7. The principles of radiocarbon dating are fairly straight forward, but in practice there are many problems. 8. Because of the difficulties associated with radiocarbon dating, each new date is given a statistical margin of error. 9. For direct archaeological applications, radiocarbon dating and tree-ring work are in general much more useful. 10. Radiocarbon Dating Radiocarbon is the single most useful method of dating for the archaeologist. 11. Conventional radiocarbon dating normally requires sample sizes which will yield a minimum of 1 g of carbon. 12. And its use in radiocarbon dating. 13. Who says there are no pyramids in Bosnia? Radiocarbon dating method confirmed that the Bosnian Pyramid of the Moon was built about ten thousand years ago! 14. Radiocarbon dating showed that the head's age matched the king's date of death. 15. Accordingto Bunce, eggshell is the best substance for radiocarbon dating andisotope analysis, which gives information about the environment inwhich the egg was laid. 16. The reliability of radiocarbon dating depends on the reliability of dating material. 17. The professor believes the radiocarbon dating of the shroud was wrong because the sample was contaminated. 18. Using the technique of radiocarbon dating, they all agreed that the cloth dated to the 13th or 14th century (1260 to 1390). 19. Radiocarbon dating showed the family lived around 2600 B.C. and belonged to the Corded Ware culture, named for the distinctive twisted impressions that decorated artifacts of the time. 20. Radiocarbon dating in 1988 showed the cloth was made between 1260 and 1390. 21. So far, radiocarbon dating of the site has linked it to the 10th and 9th centuries B. C. , the Iron Age. 22. Radiocarbon dating experts have also found advantages from working onsite with archaeologists. 23. After this pretreatment, the sample is converted to a form suitable for the particular method of radiocarbon dating to be used. 24. The sample preparation procedures are the same as those used for radiocarbon dating, care being taken to avoid contamination. 25. Palmer originally specialised in acoustics but became interested in the physics of the Earth and in measuring ages by radiocarbon dating. 26. Accelerators also used for radioisotope production, cancer therapy, Biological sterilization, and one form of radiocarbon dating. 27. Because they rely on estimation, relative techniques like stratigraphy are considered less precise than absolute techniques, like radiocarbon dating or verification from written records. 28. "We are able to date [the samples] precisely and work on samples hundreds of thousands of years old, far beyond the limit of about 50,000 years that radiocarbon dating allows," Wang told SciDev.Net. 28.try its best to collect and build good sentences. 29. This has been known for a long time, from radiocarbon dating from charcoal by paleontologists, " he says." 30. The team obtained the date of 9260 years ago for the coprolite by radiocarbon dating one of the prickly pear seeds inside.