Age of a rock using radiometric dating Adult webcam free tokens with sign up
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.
It is the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and it can be used to date a wide range of natural and man-made materials.
The best-known radiometric dating techniques include radiocarbon dating, potassium-argon dating, and uranium-lead dating.
After one half-life has elapsed, one half of the atoms of the nuclide in question will have decayed into a "daughter" nuclide, or decay product.
In many cases, the daughter nuclide is radioactive, resulting in a decay chain.
Isotopes are important to geologists because each radioactive element decays at a constant rate, which is unique to that element.
By establishing geological timescales, radiometric dating provides a significant source of information about the ages of fossils and rates of evolutionary change, and it is also used to date archaeological materials, including ancient artifacts.
The different methods of radiometric dating are accurate over different timescales, and they are useful for different materials.
The atoms of some chemical elements have different forms, called isotopes.
These break down over time in a process scientists call radioactive decay.