Sun radiometric dating
Taken as a whole, these data indicate that the Earth’s history extends backward from the present to at least 3.8 billion years into the past.
For example, scientists search for and date the oldest rocks exposed on Earth’s surface.
and is now the principal source of information about the absolute age of rocks and other geological features, including the age of fossilized life forms or the age of the Earth itself, and can also be used to date a wide range of natural and man-made materials.
Together with stratigraphic principles, radiometric dating methods are used in geochronology to establish the geologic time scale.
Scientists tried to determine Earth’s age via our planet’s layers of rock, which must have been built over time.
Nowadays, scientists use radiometric dating of various sorts of rock – both earthly and extraterrestrial – to pinpoint Earth’s age.
But Earth’s layers of rock did not give up the secret of Earth’s age easily. However, from working with layer upon layer of rock laid down on Earth over long time spans, early 20th century scientists came to believe Earth not of atoms of one chemical element into another.
They led to the discovery that certain very heavy elements could decay into lighter elements – such as uranium decaying into lead.
By dating rocks of known ages which give highly inflated ages, geologists have shown this method can’t give reliable absolute ages.
Many geologists claim that radiometric “clocks” show rocks to be millions of years old.