Sentences with phrase «grains of zircon»

Measurements on some 50 grains of zircon from the gneiss rocks found in Canada showed them to be 3.962 billion years old, with a margin of error of only three million years.

In as much as humanity's entire experience on Earth is only during the last 10,000, it's sort of anticlimatic to talk about a grain of zircon in Australia that is over 4 billion years old.

Not exact matches

The team were also able to determine where the original material in the river came from by dating mineral grains such as zircon and mica, revealing the previous course of the river.

More evidence of an earlier formation date for the Manson crater comes from the discovery in South Dakota of flawed grains of quartz, feldspar and zircon.

For the study, they looked at data for roughly 120,000 zircon grains from thousands of samples across the globe.