Sentence examples for through radiometric methods from inspiring English sources

In both cases the time dimension is added through radiometric methods applied to the same materials that show the reversals.

The concentrations are determined directly by radiometric methods or indirectly through optical changes associated with the formation of intermediates and products.

This indirect method compares accompanying animal fossils with those found in other African sites that have been dated more precisely using radiometric methods.

Ages determined by stratigraphic or radiometric methods are as great as 50,000,000 years in western Africa and more than 23,000,000 years in Australia, but duricrust formation is occurring today in some places.

When dating is not provided by classic radiometric methods, historical pictures (<100 years) may constitute a valuable alternative method to reconstruct recent environments.

Radiometric methods provide an accurate approach to dating such ancient sediments.

Additionally, the LC-MS/MS measurement gave specific radioactivity values (83 to 505 GBq/μmol) in good agreement with those from conventional radiometric methods.

Various radiometric methods such as gas flow GM (Geiger Müller) counting and liquid scintillation counting are usually used for direct measurement of 90Sr and its daughter 90Y subsequently.

The Gorge is part of the East African Rift Valley system, which is significant because the Rift preserves volcanic sediments that can be dated using radiometric methods.

Researchers had suspected that the artifacts were more than 1 million years old, but dating sediments in China has been notoriously difficult because there is no volcanic tuff for radiometric methods.

Mining has exposed fossils and layers of volcanic ash, which have been dated with radiometric methods, so Shapiro can pin down the ages of fossils back to before 40,000 years ago, the limit of radiocarbon dating.