Which type or types of rock can be dated radiometrically?

Question

Quizplus · Accepted Answer

Radiometric dating is based on the principle of radioactive decay, which occurs only in certain types of isotopes found in rocks. Igneous rocks are formed when magma or lava cools and solidifies, and often contain radioactive isotopes such as uranium and potassium. Metamorphic rocks are formed through the transformation of pre-existing rocks due to changes in pressure and temperature, and may also contain radioactive isotopes. However, sedimentary rocks are formed through the accumulation of sediments and minerals, and therefore may not contain radioactive isotopes necessary for radiometric dating.

Which Type or Types of Rock Can Be Dated Radiometrically