Sentences with phrase «measuring radioactive isotopes»

But when Borg, working with colleagues in Denmark and Washington, D.C., finished measuring radioactive isotopes in the rock, they pegged its age at 4.36 to 4.359 billion years.

Not exact matches

We still do not have any new information from a biological / scientific reaction... we must appeal on the science time to billions of years (radioactive isotopes), that we can not measure.

In 1920, he speculated that by measuring the amount of a radioactive isotope and its daughter products in rocks, geologists would be able to tell their age — a technique that has become widely used.

Krypton dating is much like the more - heralded carbon - 14 dating technique that measures the decay of a radioactive isotope — which has constant and well - known decay rates — and compares it to a stable isotope.

They studied boulders from the New Zealand site where the glacial wood had been found, measuring the concentrations in the rocks of radioactive isotopes beryllium - 10 and chlorine - 36, which are produced by nuclear reactions between minerals and cosmic rays.

Three months after the tsunami - stricken Fukushima Daiichi plant began leaking unprecedented amounts of radioactive isotopes, an interdisciplinary group of scientists will begin measuring the radioactivity in the ocean east of Japan on 4 June.

Not Ernö Rubik's latest toy, but the data from a four - year experiment to measure the half - life of the rare radioactive isotope silicon - 32.

Uranium dating is one of the ways of determining the age of ancient objects, even one million years old, by measuring how much of the following are present in them: the amount of radioactive isotopes of uranium, and the amount of other materials into which the radioactive isotopes would decompose.

Shale has a radioactive signature — from uranium isotopes such as radium - 226 and radium - 228 — that geologists and drillers often measure to chart the vast underground formations.

As shown in the graph below, cosmic - ray intensity (as measured by the radioactive carbon isotope C - 14) and terrestrial climate (as measured by the oxygen isotope O - 18) correlate in amazing detail over an interval of at least 3000 years (see graph below; the bottom graph is the central section, blown up to reveal detail)