Geologic dating relative absolute

20-Apr-2020 06:23

The half-life of many isotopes has been consistently tested and measured precisely.The half-life of the isotope is the number that determines the age of a rock.There are several elements with radioactive isotopes, including carbon-14 and uranium-238, common isotopes used for geologic dating.Accurate data can only be relied on if the mineral used for radiometric dating was in a closed system for the duration of its life -- from formation to discovery.

For example, the Principle of Original Horizontality states that all layers of sedimentary rocks are deposited in flat, parallel layers.

Absolute Dating is the method by which an actual numerical value is determined for a layer of rock.