Sentences with phrase «yields radiocarbon ages»

This information yields radiocarbon ages that can be equivalent to foraminifera ages, representing the time since these organisms were alive at the surface of the ocean and thus the age of sedimentation.

Of course, the table, so constructed, will only give the correct calibration if the tree - ring chronology which was used to construct it had placed each ring in the true calendar year in which it grew.Measurements made using specially designed, more elaborate apparatus and more astute sampling - handling techniques have yielded radiocarbon ages for anthracite greater than 70,000 radiocarbon years, the sensitivity limit of this equipment.

Not exact matches

Along with radiocarbon dating on charcoal remains from human - made fires, these analyses yielded a much more precise estimate for the age of sediments surrounding artifacts at various depths.

The radiocarbon dating of the DNA tooth enamel yielded a maximum age for Naia of 12,900 years ago, while UNM's uranium - thorium results provided a minimum age of 12,000 years ago, confirming that Naia was a Paleoamerican.

For example, a sample with a true radiocarbon age of 100,000 radiocarbon years will yield a measured radiocarbon age of about 20,000 radiocarbon years if the sample is contaminated with a weight of modern carbon of just 5 % of the weight of the sample's carbon.