The age of a sedimentary rock can also be constrained by dating metamorphic minerals in rocks unconformably beneath the sequence thus providing a maximum age for the strata or metamorphic minerals that have grown within the succession thus yielding a minimum age.
Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon in which trace radioactive impurities were selectively incorporated when they were formed.
radiometric dating of minerals in metamorphic rocks usually indicates the radiometric decay series commonly used in radiometric dating of rocks are detailed in.
If an igneous or other rock is metamorphosed its radiometric clock is reset and potassiumargon measurements can be used to tell the number of years that has passed since metamorphism carbon.
radiometric dating 239 if the isotopic dating of metamorphic rocks a metamorphic rock can provide an age for the last metamorphic event.
Sedimentary rocks cannot be dated directly using radiometric dating which is based on the idea that when rocks are in liquid form their radiometric clock resets this technique is generally used to date igneous and metamorphic rock which are rocks that were once melted due to extreme heat and pressure radiometric dating determines how long ago the liquid rock solidified into solid rock.
14 carbon dating radiocarbon dating is different than the other methods of dating because it cannot be used to directly date rocks but can only be used to date organic material produced by once living organisms 14 c is continually being produced in the earths upper.
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