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 the method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products which form at a known constant rate of decay.
In dating fissiontrack dating during the spontaneous fission of uranium238 in this unique type of radioactive decay the nucleus of a single parent uranium atom splits into two fragments of similar mass with such force that a trail of crystal damage is left in the mineral.
uranium uranium u radioactive chemical element of the actinoid series of the periodic table atomic number 92 it is an important nuclear fuel uranium constitutes about two parts per million of earths crust some important uranium minerals are pitchblende impure u3o8 uraninite uo2 carnotite a.
Many authors choose to present the history of a complex subject by breaking it up into major threads and following the history of each thread separately.
The generally accepted age for the earth and the rest of the solar system is about 455 billion years plus or minus about 1 this value is derived from several.
radiometric dating how radiometric dating works in general why methods in general are inaccurate why kar dating is inaccurate the branching ratio problem.
Our understanding of the shape and pattern of the history of life depends on the accuracy of fossils and dating methods some critics particularly religious fundamentalists argue that neither fossils nor dating can be trusted and that their interpretations are better.
Carbon dating is used to determine the age of biological artifacts up to 50000 years old this technique is widely used on recent artifacts but educators and students alike should note that this technique will not work on older fossils like those of the dinosaurs alleged to be millions of years old.
It follows that uraniumlead potassiumargon kar and rubidiumstrontium rbsr decay can be used for very long time periods whilst radiocarbon dating can only be used up to about 70000 years.