Sedimentary rocks can be dated using radioactive carbon, but because carbon decays relatively quickly, this only works for rocks younger than about 50 thousand years. So in order to date most older fossils, scientists look for layers of igneous rock or volcanic ash above and below the fossil.

What type of rock can be dated with radiometric methods quizlet?

The best rock for RADIOMETRIC DATING is IGNEOUS ROCK because Igneous Rock is separated into different minerals.

When radiometric dating is done on a rock sample the rocks what is determined?

Answer Expert Verified When radiometric dating is done on a rock sample, the rocks age is determined. Radiometric dating is a method or technique used to date materials such as rocks and carbons by comparing the relative percentage of the radioactive isotope and the stable isotope.