Start Forms of dating rocks

Forms of dating rocks

When ‘parent’ uranium-238 decays, for example, it produces subatomic particles, energy and ‘daughter’ lead-206.

Each original isotope, called the parent, gradually decays to form a new isotope, called the daughter.

Each isotope is identified with what is called a ‘mass number’.

The atoms of some chemical elements have different forms, called isotopes.

The age of the Earth is approximately one-third of the age of the universe.

An immerse amount of geological change has occurred in that timespan, accompanied by the emergence of life and its subsequent evolution.

Earth formed around 4.54 billion years ago by accretion from the solar nebula.

Geologists often need to know the age of material that they find.