Used to date rocks that are billions of years old, uranium-lead dating measures the ratio of the isotopes uranium-238 and lead-206. Uranium-238 has a half-life of 4.5 billion years, making it ideal for dating very old rocks.
Used to date rocks that are billions of years old, uranium-lead dating measures the ratio of the isotopes uranium-238 and lead-206. Uranium-238 has a half-life of 4.5 billion years, making it ideal for dating very old rocks.